2021 Mercedes-Benz GLS450
Safety record from NHTSA: recalls, owner complaints, investigations and service bulletins.
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Vehicles › Mercedes-Benz › GLS450 › 2021
These records cover every 2021 Mercedes-Benz GLS450. To see whether one car still needs a recall repair, decode its VIN or check it with NHTSA.
Recalls
12 recalls name the 2021 Mercedes-Benz GLS450. Newest first.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 GLE 350, 2020-2024 GLE 450, 2020-2023 GLS 580, GLE 580, 2019-2023 GLS 450, 2021-2023 Maybach GLS 600, AMG GLS 63, 2021-2024 AMG GLE 53, AMG GLE 53 Coupe, and AMG GLE 63 S vehicles. A 48-Volt ground connection under the passenger seat may not be secured properly, resulting in the ground…
Risk and remedy
Risk
An overheated ground connection can increase the risk of a fire.
Remedy
Dealers will inspect and tighten the 48-Volt ground connection as necessary, free of charge. Owner notification letters were mailed on May 3, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2024040002.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2023 GLE 450 and GLS 450 vehicles. The transmission may not fully downshift in certain conditions, causing the engine to stall.
Risk and remedy
Risk
An engine stall increases the risk of a crash.
Remedy
Dealers will update the transmission control unit software, free of charge. Owner notification letters were mailed March 29, 2024. Owners may contact MBUSA customer service at 1-800-367-6372.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 C-Class, E-Class, S-Class, CLS, SL, GT, GLC, GLE, GLS, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, which can result in a loss of drive power.
Risk and remedy
Risk
A loss of drive power can increase the risk of a crash.
Remedy
Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 14, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2023070012.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 GLE350, GLE450, GLS450, GLS580, 2021 AMG GLE53, AMG GLE63, Maybach GLS600, AMG GLS63, and 2020 GLE580 vehicles. The air conditioner drain hoses may have been incorrectly installed, causing water to drain into the passenger compartment.
Risk and remedy
Risk
Water intrusion into the foot wells may cause corrosion and/or short circuits to electrical components, increasing the risk of fire. In addition, the emergency call (eCall) feature may be disabled and the doors may not unlock, increasing the risk of injury. Also, the engine may not start or may enter a limp-home mode, increasing the risk of a crash.
Remedy
Dealers will inspect and reinstall the air conditioner drain hoses, as necessary, free of charge. Owner notification letters were mailed April 28, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of recall numbers 21V-288 and 19V-587. MBUSA's numbers for this recall are 2023030014 and 15.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 AMG GLS63, 2020-2022 GLS450 and GLS580 vehicles. Due to a manufacturing error, the locks on the third-row seatbacks may fail in the event of a crash.
Risk and remedy
Risk
A seat with a seatback lock failure may not properly restrain occupants, increasing the risk of injury during a crash.
Remedy
Dealers will inspect and replace the third-row seatback, as necessary, free of charge. Owner notification letters were mailed November 18, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022100011.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2022 GLE350, GLE450, GLS450, 2021-2022 AMG GLE53, 2020-2021 GLE580, GLS580, and 2021 GLE400e, AMG GLS63, AMG GLE63 S, and Maybach GLS600 vehicles. Due to a manufacturing error, the rear door window trim bars may detach.
Risk and remedy
Risk
Detached trim bars may cause a road hazard and increase the risk of a crash or injury.
Remedy
Dealers will inspect and secure the rear window trim bars, as necessary, free of charge. Owner notification letters were mailed November 1, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022090010.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card…
Risk and remedy
Risk
A disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.
Remedy
The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers are for this recall is 2022060005 and 2023110006.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2022 GLE450, GLS450, 2021-2022 AMG GLE53, 2020-2021 GLE580, GLS580, 2021 AMG GLE63, Maybach GLS600 and AMG GLS63 vehicles. A ground cable bolt for the 48V ground connection under the front passenger seat may not be secured properly, which can cause the electrical cable to overheat.
Risk and remedy
Risk
An overheated electrical cable can increase the risk of a fire.
Remedy
Dealers will inspect and tighten the ground cable bolt, as necessary, free of charge. Owner notification letters were mailed July 8, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022040017.
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2021 GLE 350, GLE 580, GLS 450, GLS 580, AMG GLE 53, AMG GLE 63 S, and AMG GLS 63 S vehicles. The rear window may be insufficiently bonded to the tailgate, which could allow the rear glass to detach.
Risk and remedy
Risk
Detached rear glass can become a road hazard, increasing the risk of a crash.
Remedy
Dealers will replace the rear window, free of charge. Owner notification letters were mailed December 8, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2021 CLA-Class, GLE/GLS-Class, A-Class, E-Class, E-Class Coupe and Convertible, GLA/GLB-Class, GLC-Class, CLS-Class, and AMG GT-Class 4-door Coupe vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The MBUX multimedia system software may cause the display to remain…
Risk and remedy
Risk
A backup camera that displays a blank image reduces the driver's rear view, increasing the risk of a crash or injury.
Remedy
The multimedia system software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed beginning June 28, 2021. Owners may contact MBUSA customer service at 1-800-367-6373. MBUSA's number for this recall is 2021050012.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication…
Risk and remedy
Risk
Failure of the eCall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.
Remedy
MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267. MBUSA's number for this recall is 2021020025.
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 CLA250, CLA250 4MATIC and CLA35 AMG 4MATIC, 2020-2021 GLE350, GLE350 4MATIC, GLE450 4MATIC, GLS450 4MATIC and GLS580 4MATIC and 2021 GLE53 AMG Coupe, GLE63S AMG 4MATIC, GLS63 AMG 4MATIC and Maybach GLS600 4MATIC vehicles. The instrument cluster software may deactivate the illumination of certain…
Risk and remedy
Risk
If the interior switches are not illuminated, they may be more difficult to find and operate, increasing the risk of a crash.
Remedy
MBUSA will notify owners, and dealers will update the instrument cluster software, free of charge. The recall began March 31, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020030019.
Owner complaints
31 complaints1 involved a crash2 involved a fire1 injuries
What owners report most
Latest complaints
- Steering
GLS 450 of this model year were recalled for failing Steering Coupling Locking Screws. While my car was not recalled it is exhibiting similar symptoms involving creaking sounds at low speeds when the engine has warmed up. The recall should be expanded.
- Wheels
Both rear wheels on this vehicle have developed cracks which leads to tire pressure loss. Apparently, this is a common issue with Mercedes' heavier vehicles like the GLS and S series sedans. To be clear, I did not hit anything. I did not do any unusual driving. Both rear tires are fine.…
Both rear wheels on this vehicle have developed cracks which leads to tire pressure loss. Apparently, this is a common issue with Mercedes' heavier vehicles like the GLS and S series sedans. To be clear, I did not hit anything. I did not do any unusual driving. Both rear tires are fine. While you expect that certain components on a vehicle will have problems, it is also reasonable to expect that wheels will not crack prematuraly. Mercedes is aware of the problems. They were named in a class action lawsuit that was dismissed because cars were out of warranty. Warranty or no warranty, this is a major safety issue as a loss in tire pressure can be catastrophic.
- Electrical system · Seats
On [XXX], I was heading home from work traveling [XXX] on [XXX] through Atlanta's usual heavy traffic. I smelled smoke inside my car and saw fire flames coming from under my passenger seat. My initial reaction was to try to put the fire out with my hat without burning myself. Also, I had to try…
On [XXX], I was heading home from work traveling [XXX] on [XXX] through Atlanta's usual heavy traffic. I smelled smoke inside my car and saw fire flames coming from under my passenger seat. My initial reaction was to try to put the fire out with my hat without burning myself. Also, I had to try to navigate across multiple lanes of traffic without hitting anyone and avoiding anyone hitting me. Safely, i reached the side of the interstate and exited the vehicle. As I stood from afar watching my vehicle burn; the reality sat it that a few minutes earlier that could have been me trapped burning inside, injured or even death because something had failed in my vehicle. Later, when I finally arrived home, I started researching on the internet to see if anyone else had experienced problems with their MB 450 GLS catching fire. Surprisingly, I found that recalls had been issued in April 2022 and March 2024 for a possible fire risk from a 48volt loose ground wire issue under the passenger seat. At that time supposedly there were no reported injuries or crashes related to this issue until now. If I am the first to witness this issue, then so be it because I saw the fire burning from inside under my passenger seat before it FULLY torched my vehicle I reported this issue first to Progressive Insurance and Mercedes-Benz Corporate. Progressive has provided my transportation according to policy for my first 30 days. As I approached the end of my rental period, I spoke with MB Corporate to see if there was anything that they could do as far as providing me transportation. I was told that there was nothing that they could do because they were not a dealership with cars to loan. The joint vehicle fire investigation was schelduled for 29 April 2025. On 25 April 2025, Progressive informed me that MB Corporate had moved the fire investigation date to 29 May 2025. NOW, what am I suppose to do? It has been almost two months that I have been without a vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMAT
- Electrical system
System malfunctioned detail: 48v battery malfunction, 12v battery malfunction. Safety concern: I was driving on [XXX] , the battery malfunction warning suddenly pop up, and I couldn't accelerate my car beyond 30 MPH, my whole family were on the car during that time. it's life threatening issue…
System malfunctioned detail: 48v battery malfunction, 12v battery malfunction. Safety concern: I was driving on [XXX] , the battery malfunction warning suddenly pop up, and I couldn't accelerate my car beyond 30 MPH, my whole family were on the car during that time. it's life threatening issue needs to be addressed. Luckily we managed to pull over to a safe border way. It's first time I encountered this issue, but on [XXX] , seems like many people encountered it. Dealer is inspecting the issue currently. orange warning msg pop up first says "48v battery malfunction", few minutes later become red warning msg, while I pulled my car to the sideway, it became red "12v battery malfunction". INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
- Electrical system
Vehicle has just over 31k miles. ON multiple occasions, the vehicle randomly shuts off and displays a 48 volt battery error on the screen followed by a check engine light. This has happened in the middle of a busy intersection and at 75mph on the interstate. Each time it does this, I have taken it…
Vehicle has just over 31k miles. ON multiple occasions, the vehicle randomly shuts off and displays a 48 volt battery error on the screen followed by a check engine light. This has happened in the middle of a busy intersection and at 75mph on the interstate. Each time it does this, I have taken it to a Mercedes dealer for repair/troubleshooting. THey perform the Mercedes required steps to repair the known issue and each time the issue persists. The car has been at a dealership for almost a combined 30 days now with no end in sight. I do not feel safe knowing that Mercedes cant seem to solve the problem and instead puts me back on the road knowing the car is not right and risks injury to my family as the issue has happened at low speed and high speed resulting in extremely dangerous situations for my family. I have 2 open PTSS cases with Mercedes USA (246121906 and 246113294). Researching this issue has revealed this is a known issue with their "mild hybrid" SUVS and many consumers have the same or similar experience to mine.
- Unknown or other
I was driving only 30mph through my suburban neighborhood bringing my kids to school in the morning when a loud shotgun sound hit my car causing me to be distracted and distraught. My entire sunroof had exploded on me for no reason. Mercedes is currently undergoing a class action lawsuit for this.…
I was driving only 30mph through my suburban neighborhood bringing my kids to school in the morning when a loud shotgun sound hit my car causing me to be distracted and distraught. My entire sunroof had exploded on me for no reason. Mercedes is currently undergoing a class action lawsuit for this. But since it is not completely yet, I’m being told I need to pay $3700 out of pocket for the default damages and servals days without a vehicle.
- Unknown or other
Vehicle was purchased pre-owned. Mercedes Me is still associated with previous owner. Mercedes unable to remove association at dealership or on the phone. I can provide bill of sale and identification. Previous owner can remote start, track and control the vehicle I own. This presents a clear…
Vehicle was purchased pre-owned. Mercedes Me is still associated with previous owner. Mercedes unable to remove association at dealership or on the phone. I can provide bill of sale and identification. Previous owner can remote start, track and control the vehicle I own. This presents a clear and obvious security and safety issue. I am not prepared to drive to *another* dealership and ask *again* to get this done. I own the car and the previous owner can do whatever they like with it. Unacceptable.
- Unknown or other
Vehicle was purchased pre-owned. Mercedes Me is still associated with previous owner. Mercedes unable to remove association at dealership or on the phone. I can provide bill of sale and identification. Previous owner can remote start, track and control the vehicle I own. This presents a clear…
Vehicle was purchased pre-owned. Mercedes Me is still associated with previous owner. Mercedes unable to remove association at dealership or on the phone. I can provide bill of sale and identification. Previous owner can remote start, track and control the vehicle I own. This presents a clear and obvious security and safety issue. I am not prepared to drive to *another* dealership and ask *again* to get this done. I own the car and the previous owner can do whatever they like with it. Unacceptable.
- Electrical system · Seats
1. Unknown, smoke started coming from under the passenger side seat, car is a complete loss. 2. Smoke damaged my lungs, there was a large amount of exploding glass, and it could have led to a structure fire. 3. Not applicable 4. In process, but it was recalled for this issue 5. No
- Electrical system
Cluster Information Display Black out on and off. Cannot see speedometer and headup display also turns off. Problem occured 5/13/22, 6/17/22, and 6/13/23. Problem is still not fixed after going to mechanic 3 times. 7/16/24 went in to mechanic again for the same problem but mechanic concluded that…
Cluster Information Display Black out on and off. Cannot see speedometer and headup display also turns off. Problem occured 5/13/22, 6/17/22, and 6/13/23. Problem is still not fixed after going to mechanic 3 times. 7/16/24 went in to mechanic again for the same problem but mechanic concluded that there are no further solution possible to fix this problem. When the problem occurs, the cluster information display is blacked out for about 3 to 4 hours, and only fixed when 1 or 2 days are fixed. It is dangerous to drive without the cluster display which includes speedometer, remaining gas, engine warning light, and many more important information that is needed and required to drive safely without crash.
- Unknown or other
I was driving and all of a sudden. The car felt like it was swirling left and right and I was trying my best to straighten the steering wheel, but it felt like I had no control of the car. I eventually hit the median on the road and while all this was happen my dashboard was flashing with all the…
I was driving and all of a sudden. The car felt like it was swirling left and right and I was trying my best to straighten the steering wheel, but it felt like I had no control of the car. I eventually hit the median on the road and while all this was happen my dashboard was flashing with all the lights, but my eyes were on the road trying to fix the steering wheel so I don’t know exactly what light was on. When I hit the median, I was finally able to regain full control of the car. It kind of felt like my car was accelerating and swerving at the same time and I was not even stepping on the pedal. I am not sure what caused this, but my car was recently in the shop for some battery issue.
- Electrical system
We accepted delivery of our brand new vehicle in May 2021 from the dealer. In July 2021, the vehicle became completely disabled due to failure of the 48 volt battery. In October 2021, the dealer replaced 48 volt battery failed again causing the vehicle to become completely disabled. In December…
We accepted delivery of our brand new vehicle in May 2021 from the dealer. In July 2021, the vehicle became completely disabled due to failure of the 48 volt battery. In October 2021, the dealer replaced 48 volt battery failed again causing the vehicle to become completely disabled. In December 2023, our 3rd replacement 48 volt battery failed. Each time the vehicle is out of service for a week or longer. The dealer is not providing any information about what may be causing the failures. Vehicle has become completely unreliable and dangerous. Mercedes Benz USA has offered us a 200 service credit and 3,000 off a new vehicle and advised they are not aware of any defects.
- Fuel system, gasoline
The contact owns a 2021 Mercedes-Benz GLS450. The contact received notification of 23V445000 (Fuel System, Gasoline) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time to for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool showed no open recall.
- Visibility/wiper
Wipers - I have had repeated issues with the windshield wipers on this vehicle. I have taken it to the dealership 3 times and I have not gotten a satisfactory solution to the issue. The wipers skip across the windshield making intermittent wipers distracting. The dealer's service manager said this…
Wipers - I have had repeated issues with the windshield wipers on this vehicle. I have taken it to the dealership 3 times and I have not gotten a satisfactory solution to the issue. The wipers skip across the windshield making intermittent wipers distracting. The dealer's service manager said this is a known issue caused by the OEM wiper blades. I've also been told they can't recommend a solution. AC - The AC in my 2021 GLS 450 smells like moldy socks which makes me suspect there is some build up on the coils or in the vent. I had the vehicle serviced 2 times at the dealership for this issue where the tech informed me the issue was not likely to be resolved by the $500 service I had paid for. The service was discounted down to $307.
- Seat belts
The contact owns a 2021 Mercedes-Benz GLS450. The contact stated while driving 40 MPH, the vehicle in front made a sudden stop, causing the contact to make a sudden stop, causing the contact’s children to fall out the seats. The contact notice that the third-row buckle latch had malfunctioned. The…
The contact owns a 2021 Mercedes-Benz GLS450. The contact stated while driving 40 MPH, the vehicle in front made a sudden stop, causing the contact to make a sudden stop, causing the contact’s children to fall out the seats. The contact notice that the third-row buckle latch had malfunctioned. The vehicle was taken to the dealer and the third-row driver’s side latch was replaced. On another occasion while driving 40 MPH, the contact heard squeaking noise coming from the rear of the vehicle. The vehicle was taken to the dealer for diagnostic test, and the mechanic stated that no failure was found. The manufacturer was contacted, and a case was filed. The failure mileage was 25,000.
- Structure › Body › Door · Unknown or other
My Mercedes has the automatic doors that close. I was closing the driver door with my back to the door and felt my thumb get caught in the drivers door. I attempted to remove it but, could not remove it. I had to watch the door slowly close and seal/crush with my finger smashed within the door. My…
My Mercedes has the automatic doors that close. I was closing the driver door with my back to the door and felt my thumb get caught in the drivers door. I attempted to remove it but, could not remove it. I had to watch the door slowly close and seal/crush with my finger smashed within the door. My wife helped me open the door and the top of my finger was smashed, as my wife said, like [XXX]. I went to the emergency room in St Petersburg Florida and as diagnosed with an acute non-displaced fracture through the distal phalanx of the first digit. The door just slowly closed on the finger. if it was a child's hand. wow INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
- Lane departure › Assist · Lane departure › Warning
Mercedes has launch a Campaign Nr 2022010001 Campaign Desc: 21P0699002 in which will retrofit augmented reality camera in 1147 vehicle model year 2021-2022 . My car came without this camera due to the chip shortage during the COVID . I contacted Mercedes Benc USA and the…
Mercedes has launch a Campaign Nr 2022010001 Campaign Desc: 21P0699002 in which will retrofit augmented reality camera in 1147 vehicle model year 2021-2022 . My car came without this camera due to the chip shortage during the COVID . I contacted Mercedes Benc USA and the rep told me to contact NHTSA in order to add my car as a part of this Campaign in order to repair this safety future on my car. This camera affect Lane keeping assistance and Lane Departure warning.
- Engine · Forward collision avoidance › Adaptive cruise control · Lane departure › Blind spot detection
On four occasions my car has stalled while in traffic very early in my ownership and then it happened again today with my family in the car and nearly caused an accident. The entire dash lights up with every warning when it happens. Sometimes the check engine light comes on after I shut the car…
On four occasions my car has stalled while in traffic very early in my ownership and then it happened again today with my family in the car and nearly caused an accident. The entire dash lights up with every warning when it happens. Sometimes the check engine light comes on after I shut the car off and restart it. My Mercedes dealer has had it in multiple times for this reason. The last time it was in for this (May of 2022) they "reprogrammed" the entire car. It happening again today has really made me lose a lot of faith in the vehicle, especially since we purchased it for the safety factors. I read online that there are many others who have experienced this. Some say it is related to the 48V battery. I don't care what Make or Model or how expensive it is, a new car should NOT stall in traffic and should be looked into. Thank You.
- Electrical system · Engine
Repeated failures of 48 volt battery system has shut vehicle totally off while under highspeed and in traffic
- Electrical system · Unknown or other
Incident 1: May 2022 Vehicle was sitting in driveway overnight and would not start in the morning. Had a 48V battery warning on. Towed to dealership. Said it was a delay software update. Incident 2: August 2022 Was driving 35mpg down the road where a warning sign comes up. Then shortly after the…
Incident 1: May 2022 Vehicle was sitting in driveway overnight and would not start in the morning. Had a 48V battery warning on. Towed to dealership. Said it was a delay software update. Incident 2: August 2022 Was driving 35mpg down the road where a warning sign comes up. Then shortly after the car slows down to around 15mph and would not speed up anymore. Towed to dealership. Dealership did not find anything "wrong" with vehicle Incident 3: November 2022 Car was parked in parking lot for 2 hours. When trying to start car, there was an error message saying stop vehicle. Towed to dealership. Dealership stating they might exchange a new 48V battery.
- Electrical system
Car turned on by itself, then 2 days later would not start. 48v battery system needed software update
- Electrical system
Car shut off while driving. Would not restart. 48 volt battery failure, needed software update
- Electrical system
Car would not start, 48 volt system failure
- Electrical system
Vehicle would not start on 3 separate occasions. The instrument panel indicated it was the 48v battery. Had it towed to Mercedes dealership to have 48v battery replaced.
- Tires
Tire Size 270/50 R 20 Tire type: Cooper Discover SRX These tires came with my 2021 Brand new Mercedes GLS 450. I bought this car in May 2021. I have had this car for only 1 1/2 years with 22K miles; tires thread are down to 0. I have kids, and this is my primary family car. I had a few bad to worst…
Tire Size 270/50 R 20 Tire type: Cooper Discover SRX These tires came with my 2021 Brand new Mercedes GLS 450. I bought this car in May 2021. I have had this car for only 1 1/2 years with 22K miles; tires thread are down to 0. I have kids, and this is my primary family car. I had a few bad to worst experiences during wet weather conditions. I took my car for my 20K service milestone; My Mercedes dealer acknowledged worn-out tire condition; advised me to purchase new tires. They never informed me about warranty replacement. I just got my tires replaced with non- cooper brand. My tire dealer shared the condition of my old tires; it was unbelievingly in horrible/Hazardous condition. See attached images of the tire. These tires should be recalled, as they are unsafe and risky to drive. Thanks, Tarun
Service bulletins
Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.
- 11010970Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY21-25 C-Class, CLA, EQB, EQE, EQS, G-Class, GLA, GLB, GLC, GLE, GLS, GT, S-Class, and SL (206, 118, 243, 294, 296, 465, 247, 254, 167, 192, 223, and 232 platform) vehicles, the MBUX multimedia system does not correspond with the latest series production configuration. The MBUX multimedia system control unit will receive an OTA software update. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit. No customer letter will be mailed for this OTA software update.
- 11010818Complaint Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick test and/or no communication possible with VGS. Cause Transmission control unit Y3/8n4 Remedy It is important that LI54.15-P-057373 is processed before replacing any component parts (transmission 722.9). After processing and complying with the above documents, perform a reset on the transmission control unit Y3/8n4 (VGS) (ignition reset), check that the transmission connector is seated correctly and inspect the PINs for concerns. If communication with the VGS cannot be established afterwards, the component part 'electrohydraulic controller unit (EHS)' must be replaced, as it is not possible to transfer the valve characteristics under the above-mentioned conditions. Installation of a VGS repair kit is not permitted in this case.
- 11010755Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the Digital Extras (previously Mercedes me) cannot be activated. The DTC B15CE00 is active or active+saved. In vehicles with "N112/9 - control unit for telematics services (HERMES)": The message "SOS - service not activated" permanently lights up in the instrument cluster AND the actual value "Error when replacing certificate (CEP.36)" is displayed in the actual values for the activation status under "Registration status" (see picture 1). In the control unit log of the "N112/9 - control unit for telematics services (HERMES)", the registration error "CEP Invalid VIN/UniqueID combination" is displayed. In vehicles with "N112/2 - control unit for telematics services (RAMSES)": The actual value "Error when replacing certificate (CEP.36)" is displayed in the actual values for the activation status under "Registration status" (see picture 1). In the control unit log of the "N112/2 - control unit for telematics services (RAMSES)", the registration error "CEP_ VIN_UNIQUEID_INVALID" is displayed. The emergency call is not impaired. Cause In the event of a control unit replacement, sporadic problems in the back end could result in data from the new control unit not being updated in the back end system. Remedy Please create a TIPS case. In some cases, the problem rectifies itself on its own after a little while.
- 11010744Complaint Engine cooling fan running for an extended time after switching off vehicle. Cause Optimized thermal management in latest PTCU software. Remedy This is a normal function in the latest PTCU software. Engine fan will operate for up to 20 minutes after ignition is switched off. Note: Repair work should only be performed if a clear malfunction is identified
- 11010494Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climatic conditions. This does not lead to any technical impairment of the rear lamps. Remedy Rear lamp: Remedy 1: Clearing fogged/condensed rear lamps: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4 F) Note: Do not wash the vehicle or subject it to high-pressure cleaning before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the trunk. 4. Switch on the exterior lighting. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation -> a significant reduction in the formation of condensation must be clearly recognizable (defogging progress). Note: -If no reduction in the degree of fogging is visible, the rear lamp is defective and must be replaced. -It is not physically possible to defog the headlamps completely some residual fogging may remain. Fogging does not impair the functionality or the service life of the rear lamps. -Simultaneous fogging of multiple component parts indicates extreme climatic conditions and also does not impair the functionality or the service life of the rear lamps. Remedy 2: You can recognize a defective rear lamp as follows: 1. Check the rear lamps to ensure that no external damage is present, and that the differential aeration cells and the diaphragm are present and correctly seated. -> If there are signs of external damage on the rear lamp, the component parts must be replaced as per WIS instructions. 2. Check the electrical connectors of the plugs and pins. -> If moisture/corrosion/etc. is present, the component part must be replaced as per WIS instructions. 3. Check for leak tightness -> Close all openings with Terostat IX or similar and establish and stabilize via an overpressure (4050 mbar) via the plug. -> In the event of a sudden pressure drop, the component part must be replaced as per WIS instructions. Note: External damage to the rear lamps does not constitute a warranty or goodwill case.
- 11010455Complaint Only vehicles with a variable transfer case are affected. Can be identified through control unit N45 or N15/7 in the quick test When accelerating with light load, vibrations or jolting sensation may come from the drivetrain Cause Modified oil quality of the transfer case over time Remedy Check initial quick test for faults in the following control units N45 - All-wheel drive (ARS) N127 - 'Drivetrain' (PTCU) control unit Y3/8 - Transmission control for 9-gear transmission (VGS) N3/10 - Engine electronics for combustion engine If faults are present, process them as per the guided test in Xentry If no faults are present: Check the oil level of the transmission If the oil level is correct: Unplug the connector for the transfer cases control unit Reassess the vehicle on a subsequent test drive If the complaint no longer occurs: Perform an oil change of the transfer case according to WIS specifications After please complete all transfer case Tech-in processes located under VG control unit Adaptations tab - Resetting the oil service data - Calibration of N15/7 Perform road test of vehicle to bring transmission to operating temperature ( >60C ) Operate vehicle in full circle with steering at full lock - 5x to the left - 5x to the right Reassess the vehicle following the oil change and teach in If the problem continues to occur with the plug removed or after the oil change has been carried out: Create a TIPS case with the following data Initial quick test with fault freeze frame data EEPROM data from Y3/8 Transmission control unit EEPROM data from N45 All-wheel drive Injector performance data
- 11010450Complaint When using the offroad display in the MBUX, the "Transparent hood" function cannot be activated using the camera symbol. Cause MBUX FUP5 software: E504.3 (A 297 904 97 00) E504.4 (A 297 904 03 01) Remedy Update of head unit A26/17 to the new software: E504.5 (A 297 904 09 01)
- 11010438Complaint Customer complains about anti-theft alarm system triggering without obvious cause when the vehicle is parked and/or when entering the vehicle. All MFA2 and 167 derivates with code 882 may be affected. Cause This is caused by a sporadic loss of communication to the anti-theft alarm system [N26/6]. In many instances there are one or more FCs U110D87, U001988, U016787 stored in the control units anti-theft alarm system [N26/6] and/or signal acquisition and actuation module [N10] / [N10/6]. The alarm system memory may contain several alarm sources. Remedy Please process all following points in succession: 1. Check - Power supply of the overhead control panel [N70] - Ground points of the overhead control panel [N70] Model series 118, 177, 247: W78 Model series 167: W15/2 Model series 243: W78/2 - LIN lines between overhead control panel [N70] and alarm siren [H3/1] - CAN lines between overhead control panel [N70] and signal acquisition and actuation module [N10] or [N10/6] 2. Open TIPS case for vehicles from production date 01.06.2023 (Send to Body/Chassis/Entertainment Inbox) - Attach photo of overhead control panel label (see example images) - Add control unit log of anti-theft alarm system [N26/6] - Add alarm history of anti-theft alarm system [N26/6], alarm siren [H3/1] and front signal acquisition and actuation module [N10/6] 3. Remedy for vehicles prior to production date 01.06.2023 - If the problem cannot be reproduced, the overhead control panel [N70] (anti-theft alarm system [N26/6] is integrated) must be replaced.
- 11010437Complaint Automatic window raising function of side window inoperative. Cause Denormalization of the window lifter system. Remedy Update the software in the affected door control unit (N69/x). This requires the door control unit (N69/x) to be commissioned. (Path: XENTRY -> Control units view -> DCU-XX (N69/x) -> Adaptations -> Commissioning) SW item numbers of the repair software: A1679023716 for the door control units on the front doors (N69/1 and N69/2) A1679023816 for the door control units on the rear doors (N69/3 and N69/4)
- 11009550Complaint Customer concern of Air Conditioning not cooling. Cause Possible refrigerant leak at the evaporator. Remedy Perform the following measures : Remedy 1 (Only applies to vehicles produced during or prior to June 2023) 1. Picture of the forming gas check being performed with RO that shows the VIN clearly in view. 2. Clear picture of VIN on B-pillar. 3. Ensure that the rest of the AC system has been thoroughly checked for leaks before condemning the evaporator. Remedy 2 (Applies to all 167's produced after June 2023) 1. Do NOT remove the expansion valve from the evaporator prior to being advised to in a TIPS case. 2. Initial Quick Test 3. Create a short video of the actual pressures via AC machine, showing the engine running, and hold a copy of the VIN/RO in view as well. 4. Picture of the forming gas check being performed with RO that shows the VIN clearly in view. 5. OBS recording of XENTRY AC actual values of compressor request to be on and current value. (Instructions in Attachments) 6. Video recording of the leak being found via sniffer at the R/F AC drain after removing the under dash panel. (see attached videos) 7. If the evaporator is found to be leaking via sniffer, another video needs to be uploaded (or a continuation if only making the video after checks), showing the expansion valve being checked for leaks. 8. If no leaks are found with the sniffer at the expansion valve, spray soapy water mix on the expansion valve and check for leaks. Upload a video showing the spray test and VIN. 9. Open a TIPS case in the HV/LV inbox labeled "167 Evaporator Suspected of Leaking" with all attachments.
- 11009549Complaint Customer complains about anti-theft alarm system triggering without obvious cause when the vehicle is parked and/or when entering the vehicle. All MFA2 and 167 derivates with code 882 may be affected. Cause This is caused by a sporadic loss of communication to the anti-theft alarm system [N26/6]. In many instances there are one or more FCs U110D87, U001988, U016787 stored in the control units anti-theft alarm system [N26/6] and/or signal acquisition and actuation module [N10] / [N10/6]. The alarm system memory may contain several alarm sources. Remedy Please process all following points in succession: 1. Check - Power supply of the overhead control panel [N70] - Ground points of the overhead control panel [N70] Model series 118, 177, 247: W78 Model series 167: W15/2 Model series 243: W78/2 - LIN lines between overhead control panel [N70] and alarm siren [H3/1] - CAN lines between overhead control panel [N70] and signal acquisition and actuation module [N10] or [N10/6] 2. Open TIPS case for vehicles from production date 6/1/2023 - Attach photo of overhead control panel label (see example images) - Add control unit log of anti-theft alarm system [N26/6] - Add alarm history of anti-theft alarm system [N26/6], alarm siren [H3/1] and front signal acquisition and actuation module [N10/6] 3. Remedy for vehicles prior to production date 6/1/2023 - If the problem cannot be reproduced, the overhead control panel [N70] (anti-theft alarm system [N26/6] is integrated) must be replaced.
- 11009122Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer fluid reservoir. 3. Washer fluid pump. 3.1. Distributor housing leaks. 3.2. Pump fitting leaks. 3.3. Washer fluid hose cannot be snapped into place on pump fitting. 3.4. Washer fluid hose will not stay on pump fitting, although connector OK. 4. Washer fluid line. 4.1 Connector will not stay on pump fitting because it is broken. 4.2 Sealing ring in connector missing. 4.3 Sealing ring in connector fitted, but deformed and therefore leaks. 4.4 Damage to washer line by animal. 5. Seal on heating washer fluid reservoir/washer fluid reservoir. Remedy Replace defective component parts only. Do not replace any adjacent component parts that are intact. Note: Repair kits for washer line hoses do exist to allow patches for line damage.
- 11008882Complaint Customer concern of Air Conditioning not cooling. Cause Possible refrigerant leak at the evaporator. Remedy Perform the following measures : Remedy 1 (Only applies to vehicles produced during or prior to June 2023) 1. Picture of the forming gas check being performed with RO that shows the VIN clearly in view. 2. Clear picture of VIN on B-pillar. 3. Ensure that the rest of the AC system has been thoroughly checked for leaks before condemning the evaporator. Remedy 2 (Applies to all 167's produced after June 2023) 1. Initial Quick Test 2. Create a short video of the actual pressures via AC machine, showing the engine running, and hold a copy of the VIN/RO in view as well. 3. Picture of the forming gas check being performed with RO that shows the VIN clearly in view. 4. OBS recording of XENTRY AC actual values of compressor request to be on and current value. (Instructions in Attachments) 5. Video recording of the leak being found via sniffer at the R/F AC drain after removing the under dash panel. (see attached videos) 6. If the evaporator is found to be leaking via sniffer, another video needs to be uploaded (or a continuation if only making the video after checks), showing the expansion valve being checked for leaks. 7. If no leaks are found with the sniffer at the expansion valve, spray soapy water mix on the expansion valve and check for leaks. Upload a video showing the spray test and VIN. 8. Open a TIPS case in the HV/LV inbox labeled "167 Evaporator Suspected of Leaking" with all attachments. Please see the list of WIS documents for forming gas leak check and recharging of the system. All documents, with the exception of videos need to be uploaded for the warranty claim. Videos are only needed if a TIPS case is opened. Ensure that a full vacuum is pulled on the system for at least 30 minutes after replacement Condenser replacement is NOT authorized as a suitable repair in lieu of the dryer not being available.
- 11008880Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the Digital Extras (previously Mercedes me) cannot be activated. The DTC B15CE00 is active or active+saved. In vehicles with "N112/9 - control unit for telematics services (HERMES)": The message "SOS - service not activated" permanently lights up in the instrument cluster AND the actual value "Error when replacing certificate (CEP.36)" is displayed in the actual values for the activation status under "Registration status" (see picture 1). In the control unit log of the "N112/9 - control unit for telematics services (HERMES)", the registration error "CEP Invalid VIN/UniqueID combination" is displayed. In vehicles with "N112/2 - control unit for telematics services (RAMSES)": The actual value "Error when replacing certificate (CEP.36)" is displayed in the actual values for the activation status under "Registration status" (see picture 1). In the control unit log of the "N112/2 - control unit for telematics services (RAMSES)", the registration error "CEP_ VIN_UNIQUEID_INVALID" is displayed. The emergency call is not impaired. Cause In the event of a control unit replacement, sporadic problems in the back end could result in data from the new control unit not being updated in the back end system. Remedy Please create a TIPS case. In some cases, the problem rectifies itself on its own after a little while.
- 11008093Complaint After clicking on the "Radio" selection function, the radio does not start and instead a permanent loading wheel is displayed. See attached picture for example. Cause Software version Remedy A26/17 - MBUX multimedia system (Head unit) unit must be replaced. When the head unit is in this condition, a software update will not remedy the situation. NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes resulting in the same or similar symptoms or conditions described in this document, and trained professional service technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained in this document does not guarantee warranty coverage nor does it extend the vehicles warranty in any way.
- 11008091Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly difficult to understand as the speed rises. Cause A. Seating of the microphones in the headliner. Side edges are covered by the textile cover (see picture "1") B. Assembly of microphones (B25/20 or B25/21) in the headliner. C. Dirt inside the microphone housing Remedy 1. Press finger on rear of microphone (on adhesive tape) 2. Remove microphone cap from the front 3. Eliminate protruding material residues of the microphone cutout at the headliner, e.g. with a soldering iron. The microphone must be seated in the headliner as shown in picture "2". 4. Push microphone from behind until it is firmly pressed into the headliner 5. Maintain pressure and press/clip cap into microphone from the front. Note: The cover cap must be clearly heard and felt to engage. 6. This procedure must be carried out on both microphones (B25/20 and B25/21) Note: It is recommended to replace the cover caps. The non-woven cloth in the cover cap protects the microphone from soiling and must not be removed. NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes resulting in the same or similar symptoms or conditions described in this document, and trained professional service technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained in this document does not guarantee warranty coverage nor does it extend the vehicles warranty in any way.
- 11007974Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment of the headlamp. A leak test must be performed to determine if physical fogging exists or if the headlamp is leaky. Remedy In advance, observe LI82.10-P-078301 "Headlamps or Front Fog Lamps Leaking or Fogged". 1. Prepare headlamp/check for external damage: For headlamps with a closed system 1. Check the headlamps for any external damage and check also for correct seating of the Gore-diaphragm/correct latching of the cover caps. 2. If the headlamp exhibits any external damage, replace the headlamp. For headlamps with an open system 1. Check the headlamps for any external damage and seal off the vent then make sure the cover caps are latched correctly into place. 2. If the headlamp exhibits any external damage, replace the headlamp. Note: A headlamp with external damage is not a warranty or goodwill case. 2. Leak test of headlamp with overpressure: Connect test adapter to pressure tester. (Figure 1) Check test adapter for leak tightness. To do so, connect plug and coupling (picture 2) and apply a maximum overpressure of 30 mbar. The pressure must remain constant. If the pressure does not remain constant, use a new adapter. Seal all the outlet openings using sealing compound and the given diaphragm with the plunger (picture 3). (Picture 4) Make allowance for the different headlamp variants here (there are different outlet openings). Check if the headlamp needs to be removed to gain access to the diagnostic socket on the headlamp housing. Plug the adapter onto the diagnostic socket on the headlamp housing. (Picture 5). Apply a maximum of 30 mbar overpressure to the headlamp housing. Note: If the maximum overpressure of 50 mbar is exceeded the headlamp seal will be damaged. If a pressure drop of less than 10 mbar is measured within 30 seconds, the headlamp is not leaky and the problem is down to natural physical fogging. If a pressure drop of more than 10 mbar is measured within 30 seconds, the headlamp is leaky. Note: The leaky position can be localized with the aid of soap suds. Replace any leaky headlamps. Note: Desiccant packs can be installed for headlamps that are not leaky. See: LI82.10-P-064766 Fogged headlamp, desiccant pack installed - open ventilation system LI82.10-P-078304 Fogged headlamp, desiccant pack installed - closed ventilation system
- 11007972Complaint After clicking on the "Radio" selection function, the radio does not start and instead a permanent loading wheel is displayed. See attached picture for example. Cause Software version Remedy A26/17 - MBUX multimedia system (Head unit) unit must be replaced. When the head unit is in this condition, a software update will not remedy the situation.
- 11007969Complaint When using the offroad display in the MBUX, the "Transparent hood" function cannot be activated using the camera symbol. Cause MBUX FUP5 software: E504.3 (A 297 904 97 00) E504.4 (A 297 904 03 01) Remedy The remedy is currently being developed.
- 11007857Complaint Customer concern of Air Conditioning not cooling. Note: For vehicles produced during or prior to June 2023, a TIPS case is not necessary. However, parts from repairs on such vehicles may be requested back for analysis at the QEC. Therefore, please follow parts disposition in NetStar. Repairs where parts are not returned per parts disposition instructions, or parts found to be NTF (no trouble found) are subject to debit. ALL steps, with the exception of videos, should be documented and uploaded with the claim submission. Cause Possible refrigerant leak at the evaporator. Remedy Perform the following measures : 1. Initial Quick Test 2. Create a short video of the actual pressures via AC machine, showing the engine running, and hold a copy of the VIN/RO in view as well. 3. Picture of the forming gas check being performed with VIN/RO in view. 4. OBS recording of XENTRY AC actual values of compressor request to be on and current value. (Instructions in Attachments) 5. Video recording of the leak being found via sniffer at the R/F AC drain after removing the under dash panel. (see attached videos) 6. If the evaporator is found to be leaking via sniffer, another video needs to be uploaded (or a continuation if only making the video after checks), showing the expansion valve being checked for leaks. 7. If no leaks are found with the sniffer at the expansion valve, spray soapy water mix on the expansion valve and check for leaks. Upload a video showing the spray test and VIN. 8. Open a TIPS case in the HV/LV inbox labeled "167 Evaporator Suspected of Leaking" with all attachments. "NO TIPS case needed on vehicles during or prior to June 2023"
- 11007796Complaint Individual functions such as sliding sunroof or roller sunblind can no longer be operated using the gesture recognition system. Cause Gesture recognition system control unit software N168 Remedy For vehicles before modification year 23/2: A remedy is currently being developed. Replacing parts will have no effect. For vehicles as of modification year 23/2: Considered to be a series production configuration. A change will not be possible in future.
- 11007753Complaint Headlamp or front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. Headlamps comply with all applicable standards. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps and LED rear lamps: 1. Drive vehicle into workshop (temperature higher than +18 C/+64.4 F) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood or trunk. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4F). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Note: If there is no visible reduction in the formation of condensation, check the headlamp for a defect. (See Remedy 2) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Remedy 2 A Damaged headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness in accordance with LI82.10-P-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. Open ventilation system: LI82.10-P-064766. Closed ventilation system LI82.10-P-078304
- 11007728Complaint To insure vehicle down time is kept at a minimum and all required information is available when case is escalated, as well as assist technicians with checks that may help lead in resolving issue without case creation. THIS LI IS NOT TO BE USED AS A REASON FOR CASE CREATION BUT AS A GUIDE IF A CASE IS NEEDED Cause There are, at times, additional steps workshops can do to help diagnose and rectify transmission complaints. Remedy When opening a case for transmissions a EEPROM, Quick Test, and VGS CUL are absolutely necessary Please also check for any relevant LIs before opening case. Also, recommend having customer fill out Transmission Drivability Diagnostic Worksheet especially if complaint is hard to reproduce or intermittent (Work sheet Location: Xentry Portal >> Local Contents >> Diagnostic Info>> Diagnostic Worksheets ) If a previous repair attempt or visit was made for the same concern please include the date, mileage, and case number if applicable of that repair/visit with a short description of what was done. Follow IPR: ( LI27.00-P-073124 ) All IPR suggestions are covered by warranty and there is no need for cases to confirm IPR. Complete IPR suggestions and close out IPR process. If complaint is not fixed and IPR still suggests the same repair once closed out and run again, then a case may be needed. Transmission Health page is a good indicator of issues within transmission if clutch or brake pack stays NOK after adaptions and unable to be made to a green OK then an internal fault is present. Proceed with replacing affected clutch pack. IF more than 3 are red and NOK replace transmission (include printout with warranty claims) **** FOR 167 chassis with M264 engine B08 may be red and NOK, IGNORE this, B08 is still okay **** Shift complaints: Note: AMG variants are known to have a harsher shift see LI27.60-P-075147 It is always worth comparing to a like vehicle if possible to see if shift is uncharacteristic Perform Valve flushing procedure Perform 5 Torque Converter adaptions in a row (Save the results page) Perform standstill adaptions (Save the results page) Drive adaptions if necessary: Drive C mode keep RPM between 2000-2200rpm and lightly let off pedal to force shift wait 2-3 sec then roll on throttle to rpm back up to 2000-2300 rpm repeat for gears 1-3 *For gears 4-8 allow rpm up to 2700 and let off slightly to force upshift = repeat x 10 *For downshift - highest gear possible 8 or 9 - allow decel with light brake drag (allow at least 5s between downshifts for trans to adapt. Go down to 2nd and repeat x10 *Change to sport mode and repeat process again *Lock car to allow sleep at least 10min and restart and road test for quality. After adaptions a new EEPROM should be recorded and included with the original if opening a case Understand shift complaints need to be reproducible to address. If needed drive with client to reproduce the complaint. If shift complaint is intermittent a CAN trace of the issue occurring will be useful (see attached instructions) Shudder: If there is a shudder monitor torque convertor actual values to see if it occurs during slipping, Additionally can lock up convertor and drive to see if issue is resolved Jolting/Shudder: If the vehicle is AWD: unplug AWD control unit or drive vehicle in dyno mode to see if transfer case is causing the jolt/ harsh shift If located from transfer case check fluid and perform a flush if needed to try to rectify the issue. Vibrations: NVH trace is needed, what level vibration is being experienced and where is it located? Is the Vibration felt in neutral? Dyno mode? Does it change with speed? Etc. Noise complaint: Isolate the noise location using chassis ear. MUST attach a sound recording or video of the noise. Describe when the noise is present: Does it change with gear or speed? Does it occur with vehicle in neutral or in glide mode? Does operating temperature effect noise? Does incline/decline or steering angel effect noise?
- 11007673Complaint Damage or discoloration to paint protection films on vehicle. Cause Chip protection films are a wear item that may need to be replaced over the life of the vehicle. They are typically not covered by vehicle warranty. Remedy To properly install a paint/chip protection film, please follow the below guidelines: #1 - Utilize a solution that is 0.2% soap solution (1,000ml of water + 2ml of liquid soap). #2 - Clean the paint surface and ensure it is dust-free. #2a - When cleaning, you can utilize isopropyl alcohol (Rubbing Alcohol) to assist with cleaning. #2b - We recommend a lint-free rag for secondary dusting. #3 - Wet hands with the soapy water solution to protect the adhesive surface. #4 - Remove the backing paper from the film completely. #5 - Moisten the vehicle surface with the soapy water. You can also lay the protective film with adhesive side out onto the wetted surface to also cover the adhesive layer in the soapy water solution. #6 - Remove film and flip over to gently place adhesive side against the paint surface. #7 - Working from the center out, use a squeegee to press the soapy water solution out from under the film. Use sufficient pressure to firmly press the film into the paint surface, but not an excessive amount to damage or stretch the film. #8 - Allow film and paint to "cure" until all of the moisture has evaporated. At this time the adhesive should be dried and cured enough for sufficient hold to release the vehicle.
- 11006678Complaint Head-up display permanently or sporadically unavailable - with warning message in driver display Head-up display permanently or sporadically unavailable - without warning message in driver display Display permanently or sporadically discolored and out of focus Cause Previous N133/1 - Instrument cluster (IC) control unit software. Remedy Update the N133/1 - Instrument cluster (IC) software.
- 11006550Complaint Customer concern of Air Conditioning not cooling. Cause Possible refrigerant leak at the evaporator. Remedy Perform the following measures : 1. Initial Quick Test 2. Create a short video of the actual pressures via AC machine, showing the engine running, and hold a copy of the VIN/RO in view as well. 3. Picture of the forming gas check being performed with VIN/RO in view. 4. OBS recording of XENTRY AC actual values of compressor request to be on and current value. (Instructions in Attachments) 5. Video recording of the leak being found via sniffer at the R/F AC drain after removing the under dash panel. (see attached videos) 6. If the evaporator is found to be leaking via sniffer, another video needs to be uploaded (or a continuation if only making the video after checks), showing the expansion valve being checked for leaks. 7. If no leaks are found with the sniffer at the expansion valve, spray soapy water mix on the expansion valve and check for leaks. Upload a video showing the spray test and VIN. 8. If the vehicle is produced AFTER June 2023, a TIPS case is required for replacement. Please open a TIPS case in the HV/LV inbox labeled "167 Evaporator Suspected of Leaking" with all attachments. 9. For vehicles produced during or prior to June 2023, a TIPS is not necessary. However, parts from repairs on such vehicles may be requested back for analysis at the QEC. Therefore, please follow parts disposition in NetStar. Repairs where parts are not returned per parts disposition instructions, or parts found to be NTF (no trouble found) are subject to debit. NOTE: Please see the list of WIS documents for forming gas leak check and recharging of the system. All documents, with the exception of videos need to be uploaded for the warranty claim. Videos are only needed if a TIPS case is opened. Ensure that a full vacuum is pulled on the system for at least 30 minutes after replacement Condenser replacement is NOT authorized as a suitable repair in lieu of the dryer not being available.
- 11005347Complaint Yellow coolant warning system message appears in instrument cluster. Fault code P048392 or P048397 present in N127 Powertrain Control Unit. Cause Faulty communication between fan and control unit N127-PTCU. Remedy If other fault codes related to engine fan are present, process these first. Replace engine fan with part as specified in XENTRY parts information. Group 50/015. Note: Do not install a lower wattage fan than what was originally installed in vehicle.
- 11005344Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic / 9G-TRONIC automatic transmission) and 725.1 (NAG3 facelift/9G-TRONIC automatic transmission facelift) For faster, more effective and more targeted diagnosis, Intelligent Predictive Repair (IPR) has been developed and integrated into XENTRY Diagnosis. This ensures an automated diagnosis process. Cause As part of the on-going quality monitoring process and associated quality and damaged part appraisals, a high number of ineffective repairs have been discovered. Such ineffective repairs have a negative impact on all those involved. For the customer, it means high costs and long repair times and for the dealer, it may result in the warranty claim being rejected. Remedy General note: IPR is available for: NAG3 Classic (automatic transmission 725.0) NAG3 - AMG sports models (AMG 43 and AMG 53 with converter) NAG3 - AMG 63 NAG3 - Hybrid
- 11005334Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness. Remedy Test Procedure: Perform an initial quick test with freeze frame data. Save the N179 - Hand detection system (HE) and N62/4 - Driver assistance system (SG-FAS) control unit logs. Note the fault frequency of fault codes set. Delete the N179 and N62/4 fault memory. Using both hands, "scan" the steering wheel all the way round, including the chrome molding at 6 o'clock (see Picture 1). Read out fault memory and follow steps below for any faults set. Remedy: Vehicles with control unit N179 - Hand detection system (HE): B1E7614: Check contacts and wiring harness in steering wheel by carrying out a visual check for damage, pinched areas, loose connections, etc. (examples in Figs. 2 and 3); If no damage is noted replace the N135 - Steering wheel electronics (LRE) and reassess. If fault code returns replace the steering wheel. Please check the wires and connections in the steering wheel. Afterwards, please check whether the complaint is caused by over torqued screws on steering wheel trim pieces. To do this, please loosen the screws slightly and reevaluate the situation. (Picture 4). P164456: Perform SCN coding. P1CA000: Perform an initial start-up on the N179 hand detection control unit. Faults in N62/4 - Driver assistance system (SG-FAS) control unit with U186B29, U0429E0, U042941, U042929, U042902, U0429E1: If no fault is stored in the N179 control unit: Scan steering wheel as indicated in the test procedure and check whether the fault is reproducible. If no fault code is stored in the hand detection control unit, the fault codes in the driver assistance systems control unit are precautionary messages. Software for the N62/4 - Driver assistance system (SG-FAS) is in preparation to reduce erroneous messages in the driver display.
- 11005331Complaint Only vehicles with a variable transfer case are affected. Can be identified through control unit N45 or N15/7 in the quick test When accelerating with light load, vibrations or jolting sensation may come from the drivetrain Cause Modified oil quality of the transfer case over time Remedy Check initial quick test for faults in the following control units N45 - All-wheel drive (ARS) N127 - 'Drivetrain' (PTCU) control unit Y3/8 - Transmission control for 9-gear transmission (VGS) N3/10 - Engine electronics for combustion engine If faults are present, process them as per the guided test in Xentry If no faults are present: Check the oil level of the transmission If the oil level is correct: Unplug the connector for the transfer cases control unit Reassess the vehicle on a subsequent test drive If the complaint no longer occurs: Perform an oil change of the transfer case Reassess the vehicle following the oil change If the problem continues to occur with the plug removed or after the oil change has been carried out: Create a TIPS case with the following data Initial quick test with fault freeze frame data EEPROM data from Y3/8 Transmission control unit EEPROM data from N45 All-wheel drive Injector performance data
- 11005294Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climatic conditions. This does not lead to any technical impairment of the rear lamps. Remedy Rear lamp: Remedy 1: Clearing fogged/condensed rear lamps: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4 F) Note: Do not wash the vehicle or subject it to high-pressure cleaning before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the trunk. 4. Switch on the exterior lighting. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation -> a significant reduction in the formation of condensation must be clearly recognizable (defogging progress).
- 11003211Complaint The following event codes are logged in control unit IDC213 - N62/4 (Intelligent Drive control unit): U0401FC and U0401FD. Cause Under analysis. Remedy Neither of the two event codes is relevant for the functioning of control unit IDC213 - N62/4 (Intelligent Drive control unit) and can be ignored.
- 11003094Complaint Customer concern of Air Conditioning not cooling. Cause Possible refrigerant leak at the evaporator. Remedy Perform the following measures : 1. Initial Quick Test 2. Create a short video of the actual pressures via AC machine, showing the engine running, and hold a copy of the VIN/RO in view as well. 3. Picture of the forming gas check being performed with VIN/RO in view. 4. OBS recording of XENTRY AC actual values of compressor request to be on and current value. (Instructions in Attachments) 5. Video recording of the leak being found via sniffer at the R/F AC drain after removing the under dash panel. (see attached videos) 6. If the evaporator is found to be leaking via sniffer, another video needs to be uploaded (or a continuation if only making the video after checks), showing the expansion valve being checked for leaks. 7. If no leaks are found with the sniffer at the expansion valve, spray soapy water mix on the expansion valve and check for leaks. Upload a video showing the spray test and VIN. 8. If the vehicle is produced AFTER June 2023, a TIPS case is required for replacement. Please open a TIPS case in the HV/LV inbox labeled "167 Evaporator Suspected of Leaking" with all attachments. 9. For vehicles produced during or prior to June 2023, a TIPS is not necessary. However, parts from repairs on such vehicles may be requested back for analysis at the QEC. Therefore, please follow parts disposition in NetStar. Repairs where parts are not returned per parts disposition instructions, or parts found to be NTF (no trouble found) are subject to debit. NOTE: Please see the list of WIS documents for forming gas leak check, AC flushing and recharging of the system. All documents, with the exception of videos need to be uploaded for the warranty claim. Videos are only needed if a TIPS case is opened. The dryer must be replaced when there is a leak in the AC system.
- 11003092Complaint Seats cannot be adjusted Seats cannot be folded Seats in the 2nd seat row cannot be locked or unlocked Normalization cannot be performed in its entirety using XENTRY Cause Various Remedy *Make sure a battery charger is connected to vehicle while performing all testing* Please perform the following checks that help to resolve most concerns: #1 - Make sure seat control units have latest software installed on them. #2 - For seat folding concerns, pay careful attention to the lock mechanism and ensure it is fully releasing. If the locking mechanism is short-stroking, please replace associated Bowden cables. #2a - Seat folding concerns can also be related to binding of the seat frame. To remedy, loosen torque off bolts holding seat frame to car. Shift seat frame and ensure there is no binding. Re-torque bolts securing seat frame to car and re-test. #2b - For 3rd row seats, you can remove the backrest cushion to expose the folding latch motor/mechanism. If the springs are loose/not-captured, then you must replace this assembly. If the assembly is not available by itself, the seat frame must be replaced (as the assembly is included in new one). #3 - For seats showing unlocked in the IC when fully locked, please check seat frame carefully for small microswitches that can be damaged. #4 - For seats moving forward but not folding upward (2nd row), please ensure the 4 small clips are still located on the inner and outer rails of the seat. If they are broken (example being passenger kicking them), the seat will not fold up.
- 11000618Customer concern of Air Conditioning not cooling. Possible refrigerant leak at the evaporator. Remedy Perform the following measures and open a TIPS case in the HV/LV inbox labeled "167 Evaporator Suspected of Leaking" In the case, please include the following: 1. Attach the Initial Quick Test 2. Short video of the actual pressures via AC machine, showing the engine running, and hold a copy of the VIN/RO in view as well. 3. Picture of the forming gas check being performed with VIN/RO in view. 4. OBS recording of XENTRY AC actual values of compressor request to be on and current value. (s 5. Video recording of the leak being found via sniffer and location. Note - Please see the list of WIS documents for forming gas leak check, AC flushing and recharging of the system. The dryer must be replaced when there is a leak in the AC system.
- 11000610Complaint 1. Cracking noises from the area of the rear axle 2. or a message in the instrument cluster "ESP, ABS failed". Cause Anti-cracking disk at the external joint of the side shaft at the rear axle is broken. Remedy Customer complaint due to noises: A test drive must be performed. For a precise noise analysis (localization of the noise), make use of the NVH/PICO. If the joint of the side shaft can be clearly identified as the cause (source of the noise), the following work must be performed: 1. Remove the side shaft, check the anti-cracking disk, and remove the anti-cracking disk if it is broken, 2. then process the external joint as per LI35.30-P-058566 and reinstall the side shaft. After the processing is complete, an anti-cracking disk is no longer required. Customer complaint due to display message "ESP, ABS failed" in the instrument cluster: Read out the fault memory; if a rotational speed sensor of the rear axle is stored in the fault memory, the following work must be performed: 1. Check the rotational speed sensor of the affected side for damage and replace if necessary. 2. Remove the side shaft, check the anti-cracking disk, and remove the anti-cracking disk if it is broken, 3. then process the external joint as per LI35.30-P-058566 and reinstall the side shaft. After the processing is complete, an anti-cracking disk is no longer required. Note: It is not necessary to replace the side shaft.
- 11000606Complaint Message in Instrument Cluster: "Active Brake Assist function restricted". The driver assistance systems are temporarily unavailable. Note: Please note the listed fault code! Cause Rarely, it may be the case that communication is interrupted due to a brief interruption in the power supply to the LRR (B92/12) or A108 (Active Brake Assist). Remedy Perform new SCN coding at BC_R (N10/8).
- 11000597Complaint Customer concern of Air Conditioning not cooling. Cause Possible refrigerant leak at the evaporator. Remedy Perform the following measures and open a TIPS case labeled "167 Evaporator Suspected of Leaking" In the case, please include the following: 1. Attach the Initial Quick Test 2. Short video of the actual pressures via AC machine, showing the engine running, and hold a copy of the VIN/RO in view as well. 3. Picture of the forming gas check being performed with VIN/RO in view. 4. OBS recording of XENTRY AC actual values of compressor request to be on and current value. (s 5. Video recording of the leak being found via sniffer and location. Note - Please see the list of WIS documents for forming gas leak check, AC flushing and recharging of the system. The dryer must be replaced when there is a leak in the AC system.
- 11000542High-frequency interference noise may be heard from the speakers while driving. This complaint only occurs when "voice amplification" is active. Coupling noise of microphone signal in voice amplification. Intermediate remedy: The interference noise can be remedied by deactivating voice amplification: "Home" -> "Settings" -> "System" -> "Audio" and de-select "Voice amplification to rear" to switch off the function (see attachment). Note: To activate or deactivate the function, the ignition must be switched on, seat belts (at rear and front) must be fitted and the doors, windows and roof must be closed. Permanent solution: Perform software update of MBUX multimedia system (A26/17) to E419.5 (available from 06/19) or greater. Deactivate the voice amplification feature. Inform customer of function and effects of additional sounds caused by driving over bumps or uneven road surfaces.
- 11000541Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY21-24 C-Class, CLA, EQB, EQE, EQS, GLA, GLB, GLC, GLE, GLS, GT, S-Class, and SL (118, 167, 192, 206, 223, 232, 243, 247, 254, 290, 294, 295, 296 and 297 platform) vehicles, the MBUX system software does not correspond with the latest series production configuration. The MBUX system will receive an OTA update that includes general product improvements and robustness enhancements for a better entertainment experience. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit. No customer letter will be mailed for this OTA software update.
Every Mercedes-Benz GLS450 model year
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