2019 Mercedes-Benz Cla 250
Safety record from NHTSA: recalls, owner complaints, investigations and service bulletins.
Have the VIN?
Vehicles › Mercedes-Benz › Cla 250 › 2019
These records cover every 2019 Mercedes-Benz Cla 250. To see whether one car still needs a recall repair, decode its VIN or check it with NHTSA.
Recalls
6 recalls name the 2019 Mercedes-Benz Cla 250. Newest first.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2014-2020 C-Class, CLA, GLA, S-Class, GLC, and GLE vehicles. Please refer to MBUSA's recall report for specific vehicle details. The front roof panel located between the windshield and the panoramic sunroof may not have been bonded correctly to the vehicle during a prior repair, allowing the front panel…
Risk and remedy
Risk
A detached roof panel can become a road hazard, increasing the risk of a crash.
Remedy
Dealers will replace the front panel, free of charge. Owner notification letters were mailed on August 2, 2024. Owner notification letters will be mailed in phases, on, March 22,2024, and August 2, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of NHTSA recall number 21V-197.
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 2017-2020 C300 Coupe, C43 Coupe AMG, C43 AMG, 2015-2020 C300, GLA250, 2016-2018 C350e, CLA45 Coupe AMG, 2015 C400, S65 AMG, 2015-2019 C63 AMG, 2016 C450, 2015-2016 GLA45 AMG, S600, 2016-2020 GLC300, 2017-2019 GLC43 AMG, GLE43 Coupe AMG, 2014-2019 CLA250 Coupe, 2014-2015 CLA45 AMG, 2018 GLC63 AMG, 2014-2017…
Risk and remedy
Risk
The adhesive bonding of the front panel might deteriorate, possibly causing the front panel to detach from the vehicle and become a road hazard, increasing the risk of a crash.
Remedy
Mercedes-Benz dealer will remove the bonded panel and will install a new front panel by following the detailed repair instructions and using the approved primer, cleaner and adhesive, free of charge. Owner notification letters were mailed on September 3, 2021 and October 26, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2019 C300, E300, 2018-2020 CLA250, 2020 CLS450, AMG E53, AMG GT53, GLE450, 2018 AMG E63, AMG GTA, 2017-2020 GLA250, GLC300, 2019 GLC350, AMG GLC43, 2017-2018 GLE350, 2019 AMG GLC 43, GLC350, GLE400, 2017 GLS450, S550, C300 Cabrio, and 2018-2019 S560 vehicles. On June 18, 2021, an additional 9…
Risk and remedy
Risk
A disabled eCall system would prevent a vehicle occupant from contacting emergency services through the call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.
Remedy
MBUSA will notify owners, and dealers will inspect the communication module and activate it, if necessary, free of charge. The recall began March 31, 2021. Letters for the owners of the 9 additional vehicles were mailed July 9, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021030005.
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 2019 CLA250 and CLA250 4MATIC vehicles. The right side door locks may not have been properly manufactured. As a result, the right-side doors may not be able to be opened from outside of the vehicle.
Risk and remedy
Risk
In the event of a crash, if the right side doors cannot be opened from the outside, it could increase the risk of injury.
Remedy
MBUSA will notify owners, and dealers will replace the door locks, free of charge. The recall began May 3, 2019. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2019030020.
Owner complaints
23 complaints2 involved a crash2 injuries
What owners report most
Latest complaints
- Unknown or other
1. The suspected component is the rear differential/rear axle assembly in my 2019 Mercedes-Benz CLA 250 4MATIC. The vehicle has developed abnormal knocking, popping, and drivetrain noises, particularly during turning and low-speed maneuvering. A repair facility provided an estimate of approximately…
1. The suspected component is the rear differential/rear axle assembly in my 2019 Mercedes-Benz CLA 250 4MATIC. The vehicle has developed abnormal knocking, popping, and drivetrain noises, particularly during turning and low-speed maneuvering. A repair facility provided an estimate of approximately $8,180 to replace the rear differential assembly. I am requesting further review to confirm the exact cause of the failure. The vehicle and any removed components may be made available for inspection upon request, subject to repair arrangements and retention of the original parts. 2. The abnormal rear drivetrain noises raise concerns about the reliability and safe operation of the vehicle. Because the suspected issue involves the rear differential/drivetrain, I am concerned that an unresolved mechanical problem could worsen and potentially affect vehicle control or safe operation. I have not established that a loss of control or other specific safety event has occurred, but I am requesting that the condition be investigated to determine whether it presents a safety risk. 3. An independent repair facility evaluated the vehicle and provided an estimate of approximately $8,180 for rear differential replacement. However, I am seeking further confirmation of the precise failure and its cause. 4. The vehicle has been evaluated by an independent repair facility, which provided an estimate for rear differential replacement. Mercedes-Benz has not yet inspected the vehicle or confirmed the diagnosis. I have not had the vehicle inspected by police or insurance representatives in connection with this issue. Before the proposed repair, I noticed abnormal knocking and popping noises while driving and turning. The symptoms prompted me to seek a mechanical evaluation, after which I received an estimate for rear differential replacement. To my knowledge, no warning lamps or dashboard messages appeared before the symptoms began. I do not have a confirmed date of the noises.
- Fuel/propulsion system
To Whom It May Concern, I am writing to file a formal safety complaint regarding my 2019 Mercedes-Benz CLA250 involving a leaking fuel rail that caused the vehicle to shut down and become unsafe to operate. The failure of the fuel rail resulted in a fuel leak and engine shutdown. A failure within…
To Whom It May Concern, I am writing to file a formal safety complaint regarding my 2019 Mercedes-Benz CLA250 involving a leaking fuel rail that caused the vehicle to shut down and become unsafe to operate. The failure of the fuel rail resulted in a fuel leak and engine shutdown. A failure within the fuel delivery system presents a serious safety concern, as it can cause sudden loss of power while driving and poses a potential fire hazard if fuel comes into contact with hot engine components. During the repair process, I was informed that the necessary replacement component, Fuel Rail Part Number 2700701995, is no longer being produced by Mercedes-Benz. Because this critical component is unavailable, the vehicle cannot currently be repaired and is therefore undrivable. It is deeply concerning that a safety-related fuel system component for a 2019 vehicle is no longer available. Without access to this essential part, the vehicle is effectively disabled. Additionally, based on the nature of this failure, I believe this fuel rail defect should be included in the recall list for this vehicle. A leaking fuel rail capable of shutting down the engine represents a significant safety risk that may affect other vehicles of the same model. I have attempted to contact Mercedes-Benz Customer Care at [XXX] on seven separate occasions and have left messages requesting assistance, but I have not received a return call. Because this issue involves both a serious fuel system failure and the inability to obtain a critical replacement part, I respectfully request that the National Highway Traffic Safety Administration investigate whether this defect affects other 2019 Mercedes-Benz CLA250 vehicles and determine whether a recall is warranted. Vehicle Information: Year: 2019 Make: Mercedes-Benz Model: CLA250 VIN: [XXX] Part in Question: Fuel Rail – Part No. 2700701995 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
- Unknown or other
The sunroof is off the track. There seems to have been a recall for my make and model and year of vehicle (2019 Mercedes CLA 250) though Mercedes tells me that my vin # is not among those that were recalled. However, they told me that if I could reach out to NHTSA, that it would be possible that…
The sunroof is off the track. There seems to have been a recall for my make and model and year of vehicle (2019 Mercedes CLA 250) though Mercedes tells me that my vin # is not among those that were recalled. However, they told me that if I could reach out to NHTSA, that it would be possible that my vehicle would be added to the recall, which would force Mercedes to have to repair the issue at their cost, so this is me doing that.
- Engine
Just paid $4,154.67 to have my 2019 mercedes cla 250, with just 46,222 miles, engine repaired. * repace fuel injector seals/orings $1,462.80 *replace all 4 fuel injectors $2,512.62 so, please tell why there IS no recall on my car????? mark boultinghouse (240)277.9752
- Engine · Fuel/propulsion system
My 2019 Mercedes-Benz CLA 250 has become unsafe to drive due to strong gasoline fumes filling the cabin. The smell is overwhelming and makes it difficult — and frankly dangerous — to sit in the vehicle for more than a few minutes without feeling lightheaded. I have since learned that this issue is…
My 2019 Mercedes-Benz CLA 250 has become unsafe to drive due to strong gasoline fumes filling the cabin. The smell is overwhelming and makes it difficult — and frankly dangerous — to sit in the vehicle for more than a few minutes without feeling lightheaded. I have since learned that this issue is part of a known defect covered under NHTSA Recall #21V961, which affects 2016–2020 CLA 250 models for a fuel leak and potential fire hazard. Despite the recall directly describing this exact problem — fuel vapors entering the passenger compartment — I was told that Mercedes-Benz will not cover the repair costs, even though the recall was never performed on my car. This is deeply concerning, as gasoline fumes inside the cabin pose not only a serious health risk from inhalation but also a potential fire or explosion hazard. It’s unacceptable that a manufacturer would refuse to remedy a safety recall issue, especially one involving a known fuel system defect that could endanger both the driver and passengers. I’m left with a car that’s unsafe to drive and a manufacturer unwilling to take responsibility for a problem they’ve already acknowledged through the NHTSA.
- Fuel/propulsion system · Unknown or other
My 2019 Mercedes-Benz CLA 250 has become unsafe to drive due to strong gasoline fumes filling the cabin. The smell is overwhelming and makes it difficult — and frankly dangerous — to sit in the vehicle for more than a few minutes without feeling lightheaded. I have since learned that this issue is…
My 2019 Mercedes-Benz CLA 250 has become unsafe to drive due to strong gasoline fumes filling the cabin. The smell is overwhelming and makes it difficult — and frankly dangerous — to sit in the vehicle for more than a few minutes without feeling lightheaded. I have since learned that this issue is part of a known defect covered under NHTSA Recall #21V961, which affects 2016–2020 CLA 250 models for a fuel leak and potential fire hazard. Despite the recall directly describing this exact problem — fuel vapors entering the passenger compartment — I was told that Mercedes-Benz will not cover the repair costs, even though the recall was never performed on my car. This is deeply concerning, as gasoline fumes inside the cabin pose not only a serious health risk from inhalation but also a potential fire or explosion hazard. It’s unacceptable that a manufacturer would refuse to remedy a safety recall issue, especially one involving a known fuel system defect that could endanger both the driver and passengers. I’m left with a car that’s unsafe to drive and a manufacturer unwilling to take responsibility for a problem they’ve already acknowledged through the NHTSA.
- Structure › Body
As i was driving on the freeway the front acylic panel conected to the sun roof just fell off the car nearly striking another vehicle. I have bein seeing alot of other ppl are having this issue yet it has not been recalled
- Engine
Nov 29, 2024. Check engine light goes on. Took it to the dealership and says P052E-71, crank ventilation malfunction, first they said it was on recall now they say it isn’t so Mercedes Benz of Huntington does not want to repair it.
- Fuel/propulsion system
Fuel lines, strong gas smell inside the cabin, the gas leak posed a significant safety hazard, risk of fire or explosion, risk of carbon monoxide poisoning, risk of injury or death to myself and/or others. It has happened while driving, while parked, during refueling, this vehicle has been…
Fuel lines, strong gas smell inside the cabin, the gas leak posed a significant safety hazard, risk of fire or explosion, risk of carbon monoxide poisoning, risk of injury or death to myself and/or others. It has happened while driving, while parked, during refueling, this vehicle has been inspected twice, the last inspection was done at Star Motors Auto Repair Shop in Sacramento, CA, I request that the Manufacturer investigate this serious safety issue. I request that Manufacturer take appropriate action to repair the vehicle and ensure my safety. I request compensation for any expenses incurred due to the gas leak, I believe this gas leak presents a serious safety hazard and demands immediate attention.
- Air bags
The contact owned a 2019 Mercedes-Benz CLA250. The contact stated while driving at approximately 55 MPH when the contact was cut off by another vehicle, the contact stated that he depressed the brake pedal in a panic stop. The contact stated that he was crashed into the rear end of his vehicle by a…
The contact owned a 2019 Mercedes-Benz CLA250. The contact stated while driving at approximately 55 MPH when the contact was cut off by another vehicle, the contact stated that he depressed the brake pedal in a panic stop. The contact stated that he was crashed into the rear end of his vehicle by a vehicle from behind and was pushed into the rear of the vehicle that had cut him off. The contact stated that the force of the crash turned the vehicle off. The contact stated that the front end of his vehicle, the hood, grill, and lights were crushed and crumpled back to the front wheel wells. The contact stated that the trunk and rear bumper were damaged. The contact stated that the rear bumper was nearly detached from the vehicle. The contact stated that his vehicle and the vehicle he had crashed into were towed to impound lots. The contact that the vehicle that crashed into his rear end was not towed. The contact stated that the driver's air bag had not been deployed, no air bags had deployed. The contact stated that his insurance provider declared the vehicle a total loss. The contact stated that the police were on the scene and had written a report. The contact drove to his personal doctor due to pain in his right side ribs, and bruising on his left bicep. The manufacturer was not informed of the failure. The failure mileage was approximately 52,000.
- Engine
Although I bought this 2019 Mercedes Benz CLA 250 less than 1 year ago with 18,600 miles on it, in May 2024 the check engine light came on and the dealer service shop gave the following diagnosis: CRANKCASE VENTILATION HOSE. Comments: THE CRANKCASE VENTILATION HOSE HAS AN INTERNAL FAILURE AND IS…
Although I bought this 2019 Mercedes Benz CLA 250 less than 1 year ago with 18,600 miles on it, in May 2024 the check engine light came on and the dealer service shop gave the following diagnosis: CRANKCASE VENTILATION HOSE. Comments: THE CRANKCASE VENTILATION HOSE HAS AN INTERNAL FAILURE AND IS CAUSING THE CHECK ENGINE LIGHT. THE CRANKCASE VENT HOSE IS NEEDED TO BE REPLACED. Repair Estimate: $1769.00 They told me that it is a known issue and that many other models have been recalled, but because my exact make, year, and model was not yet included I would have to pay out of pocket. This seems wrong since the issue is so prevalent among Mercedes models that there is a national backorder on the part with no definite end. When I reached out to Mercedes about this, they were unwilling to do anything. Please make them add it to the long list of models that have received recalls/extended warranty for this!
- Exterior lighting › Headlights
The contact owns a 2019 Mercedes-Benz CLA250. The contact stated that while driving at an undisclosed speed, he became aware that the passenger's side headlamp was not functioning properly. No warning lights were illuminated. The vehicle was taken to the dealer, who did not provide a specific…
The contact owns a 2019 Mercedes-Benz CLA250. The contact stated that while driving at an undisclosed speed, he became aware that the passenger's side headlamp was not functioning properly. No warning lights were illuminated. The vehicle was taken to the dealer, who did not provide a specific diagnostic result but determined that the headlamp needed to be replaced. The vehicle was not repaired due to parts not being available. The manufacturer was not notified of the failure. The failure mileage was 50,000.
- Tires
Multiple tires have developed a bulge in the sidewall. This is now the third time.
- Wheels
The rims of the Mercedes continually crack with moderate low speed driving. Has happened 4 to 5 times with under 50,000 miles, leaving me with constant flat tires, once on the George Washington bridge and once at night in a deserted area with zero warning. Luckily, I was able to remove my vehicle…
The rims of the Mercedes continually crack with moderate low speed driving. Has happened 4 to 5 times with under 50,000 miles, leaving me with constant flat tires, once on the George Washington bridge and once at night in a deserted area with zero warning. Luckily, I was able to remove my vehicle to the side. I was towed to Mercedes and they suggested changing out all 4 tire rims without a warranty as will happen again. VERY EXPENSIVE. The coupe models have this problem after 2019. Material for rims came from China, not Germany. I found a good rim repair shop and have done 4 times. He said he gets these all the time and there can be no warranty as the design of the tire and rims is flawed. 175.00 per rim. Mercedes of 2019 and forward as well as BMW's of this model (a Coupe) have this as recurring problem so no warranty on the work. Clearly a materials, manufacturing defect that Mercedes won't own.. I carry a Ryobi blower in the car and have to blow up my tires every morning which deflate every night.!! Crazy
- Wheels
The contact owns a 2019 Mercedes-Benz CLA250. The contact stated that on several occasions, several cracks were discovered on all four rims upon inspection. The vehicle was taken to an independent mechanic and the dealer, and the contact was informed that the rims needed to be replaced. The contact…
The contact owns a 2019 Mercedes-Benz CLA250. The contact stated that on several occasions, several cracks were discovered on all four rims upon inspection. The vehicle was taken to an independent mechanic and the dealer, and the contact was informed that the rims needed to be replaced. The contact stated that some of the cracks had recently been formed. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 50,000.
- Visibility/wiper
No incident. Reporting that the tinted rear window is blistering and causing an issue with visibility.
- Back over prevention
The contact owns a 2019 Mercedes-Benz CLA250. The contact stated that the rear-view camera failed to operate as needed. The contact took the vehicle to the dealer who confirmed that the backover prevention system failed and needed to be replaced. The vehicle had not been repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 50,000.
- Communication · Electrical system
The contact owns a 2019 Mercedes Benz CLA250. The contact received a notification for NHTSA Campaign Number: 22V365000 (Electrical System, Communication) however, the part to do the recall repair was unavailable. The dealer was made aware of the issue and confirmed that parts were not yet…
The contact owns a 2019 Mercedes Benz CLA250. The contact received a notification for NHTSA Campaign Number: 22V365000 (Electrical System, Communication) however, the part to do the recall repair was unavailable. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was also made aware of the issue. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact had not experienced a failure. Parts distribution disconnect.
- Communication · Electrical system
The contact owns a 2019 Mercedes-Benz CLA250. The contact received notification of NHTSA Campaign Number: 22V365000 (Electrical System, Communication) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had…
The contact owns a 2019 Mercedes-Benz CLA250. The contact received notification of NHTSA Campaign Number: 22V365000 (Electrical System, Communication) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
- Vehicle speed control
The contact owned a 2019 Mercedes Benz CLA250. The contact stated that while driving into the parking garage the vehicle suddenly experienced unintended acceleration causing the driver to lose control of the vehicle and crash into a brick wall and a parked vehicle. During the incident, the driver…
The contact owned a 2019 Mercedes Benz CLA250. The contact stated that while driving into the parking garage the vehicle suddenly experienced unintended acceleration causing the driver to lose control of the vehicle and crash into a brick wall and a parked vehicle. During the incident, the driver sustained head trauma and bruising of the limbs. The vehicle was destroyed and towed away. A police report was taken at the scene. The cause of the failure was not determined. The local dealer and manufacturer were both notified of the incident. The failure mileage was 20,000.
- Wheels
I have had this vehicle for a year and a half and I don't drive it much. The vehicle has 12,000 miles on it and I'm a very careful driver. I very rarely hit any potholes and have never been involved in an accident. After my tire kept losing air, I took it to the dealership to find out that not only…
I have had this vehicle for a year and a half and I don't drive it much. The vehicle has 12,000 miles on it and I'm a very careful driver. I very rarely hit any potholes and have never been involved in an accident. After my tire kept losing air, I took it to the dealership to find out that not only IS one of the rims cracked but the other three rims are bent. I have no idea how this could have happened, considering how careful I am and that no one else has ever driven my vehicle before. I strongly believe that I was sold a vehicle with defective wheels and through research, I see that many other cla owners are experiencing the same issues. These wheels cost about $1,000 each to replace and have them installed by the dealership and this IS not only very costly but dangerous for mercedes to continue making.
- Visibility › Sun/moon roof assembly
TL* the contact owns a 2019 mercedes-benz cla250. While driving 65-70 mph, an abnormal explosive sound was heard. The contact noticed that the sun roof had exploded. There were no injuries. The contact stated that the sun roof was not impacted by road debris at the time of the failure.…
TL* the contact owns a 2019 mercedes-benz cla250. While driving 65-70 mph, an abnormal explosive sound was heard. The contact noticed that the sun roof had exploded. There were no injuries. The contact stated that the sun roof was not impacted by road debris at the time of the failure. Mercedes-benz of tampa (4400 n dale mabry hwy, tampa, fl 33614, (813) 579-2138) was contacted by phone and informed of the failure. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The approximate failure mileage was 4,506. The vin was invalid. *Ln*jb
- Air bags · Steering
TL* the contact owns a 2019 mercedes-benz cla250. The contact stated that the air bag indicator illuminated and the steering became difficult to maneuver. The "front left malfunction" and "service required" messages appeared on the instrument panel. The vehicle was taken to park place motor cars…
TL* the contact owns a 2019 mercedes-benz cla250. The contact stated that the air bag indicator illuminated and the steering became difficult to maneuver. The "front left malfunction" and "service required" messages appeared on the instrument panel. The vehicle was taken to park place motor cars mercedes-benz (5601 bryant irvin rd, fort worth, tx 76132, (817) 310-9745) where it was diagnosed that the air bags needed new wiring. The vehicle was repaired. The manufacturer was not notified. The failure mileage was 600.
Defect investigations
NHTSA’s Office of Defects Investigation opened these reviews into vehicles including this one.
- Front Roof Panel Detachment
On January 8, 2021, after ongoing review with Mercedes Benz, the National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation (ODI) opened PE21-001 to assess allegations of front roof panel detachments while driving at highway speeds in certain 2015 Mercedes-Benz (Mercedes) C-Class…
On January 8, 2021, after ongoing review with Mercedes Benz, the National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation (ODI) opened PE21-001 to assess allegations of front roof panel detachments while driving at highway speeds in certain 2015 Mercedes-Benz (Mercedes) C-Class vehicles.The subject front roof panel is a stationary panel composed of polycarbonate and is attached to the vehicle via adhesive at the time of manufacture. The panel is found on subject vehicles equipped with panoramic sunroofs. Over time, the subject panels may exhibit cosmetic degradation leading to replacement of the panel, a procedure which entails: removal of the old panel and adhesive, site preparation, and installation of a replacement panel with new adhesive.The consumer complaints that prompted the opening of PE21-001 all described detachments of front roof panels that had been replaced after the vehicle was put into service.Mercedes' internal investigation identified a broader scope of affected vehicles (2014-2020 CLA, GLA, C, S, GLC, and GLE class) and found the following potential service procedure- related causes of front roof panel detachments:- Improper surface pretreatments such as the use of the wrong primer or cleaner or scoring of the surface; or - Use of the incorrect adhesive.These conditions lead to a front roof panel bond that, even if sound at the time of repair, cannot maintain its strength over time and environmental exposure.Mercedes updated its service and parts ordering systems to reinforce the proper use of specified kits and procedures via webinars, shop foreman meetings, and explicit reference to the risks incurred by diverging from the repair procedures. Mercedes is also furnishing parts ordering assistance, and will hold dealerships accountable for improper repairs.ODI's analysis of the ten complaints it has received from the public (VOQ's) and MBUSA's complaint data submitted in response to the information request letter for PE21-001 identified a total of 57 non-duplicative reports alleging incidents in which the front roof panel detached from the vehicle while in motion. Included within the 57 reports are incidents where consumers state the panel detached ...and flew off into traffic.On March 19, 2021, Mercedes notified NHTSA that it would recall subject vehicles with front roof panels known to have been replaced after the original sale of the vehicle. In total, the recall (designated as Recall 21V197) covers 15,099 vehicles that were ever registered in the United States. Based on Recall 21V197 and the remedy implemented by Mercedes, further investigation does not appear to be warranted at this time.Accordingly, this investigation is closed.The ODI complaints cited above can be viewed at www.nhtsa.gov under the following ODI identification numbers: 11376425, 11352686, 11351629, 11349158, 11341541, 11337594, 11324100, 11311591, 11222127, 11404183
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.
- 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.
- 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.
- 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.
- 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.
- 11008712Complaint Check engine light on. One of the below fault codes is current in the engine control module (N3/10). P04DB29, P04DB31, P04DB79 Cause Open circuit or high resistance to crankcase vent line contact Remedy 1. Check the electrical connector for the relevant vent line contact switch noted below. Refer to attached photos of connection locations. 2. Ensure the bolted connection is secure and bolt can be torqued (9Nm). 3. Check continuity from vent line connection to ME control unit. Repair wire if damage is found. The circuit from ME provides 5V and is pulled to 0V when the ground connection is intact. M260 P04DB31- S88/15 P04DB79- S88/16 M264 P04DB31- S88/15 P04DB79- S88/16 P04DB29- S88/17 M270/M274 P04DB79- S88/5 Note: This repair is not warrantable if the connection was left loose during previous repair/maintenance.
- 11008323Complaint Headlamps fogged or droplets forming. Cause Due to its outlet openings, the headlamp is an "open system". This means that acidic gases, moisture, dirt and exhaust gases can penetrate into the headlamp. This can lead to the formation of condensation on the lens of the headlamp. The headlamps comply with all applicable US standards and regulations. Remedy Check housing cover of lamp unit for natural fogging or condensation as per LI82.10-P-078301. If a reduction in the degree of fogging is visible, the desiccant packs can be used once the condensation has completely evaporated. Note: Order service covers and desiccant packs based on the validity description. 1. Remove headlamps. 2. Remove all grommets from outlet openings. 3. Seal vent openings with sealing profile. Important: All openings must be sealed carefully for the pressure compensation diaphragm to work properly! 4. Remove existing service cover. 5. Place desiccant packs into the new service covers and bolt down (Picture_01). 6. Glue the new diaphragm onto the intended surface at the service cover (Picture_02). Note: The bonding surface must be clean and dry. 7. Attach service cover with desiccant pack at headlamp. 8. Install headlamp. To ensure that the desiccant pack (absorption) acts effectively, the headlamp has to be air-sealed. Observe or check the following points for this: 1. Seals at the central connector must all be present and correctly fitted (Picture_03). 2. The new transparent diaphragm must be correctly bonded (Picture_04). 3. Check headlamp housing for any external damage.
- 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.
- 11008056Complaint Check engine light on. Fault code P207273 - "Throttle actuator valve is blocked due to ice" stored. Engine may crank and not start. Fault code P210185 may also be stored. Cause Moisture freezing on throttle actuator during extreme low ambient temperatures. Remedy Update software of engine control module. Software increases throttle valve flapping after engine turned off to prevent moisture buildup.
- 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
- 11007790Complaint Headlamps fogged or droplets forming. Cause Due to the housing cover with pressure compensation diaphragm, the headlamps are a "closed system". This means that the headlamps are protected against acid gases, dirt and exhaust gas. However, moisture can still enter from two sources. Through absorption and desorption (the commonest cause) or through permeation. Moisture is either absorbed by the plastic material and, when the light source is switched on, it is released from the plastic by desorption, or the moisture penetrates through the plastic materials of the headlamp from outside (permeation). This can lead to the formation of condensation on the lens of the headlamp. The headlamps comply with all applicable US standards and regulations. Remedy Check headlamps for natural fogging or condensation as per LI82.10-P-078301. If a reduction in the degree of fogging is visible, the desiccant packs can be used once the condensation has completely evaporated. Note: Order service covers and desiccant packs based on the validity description. 1. Remove existing service cover with diaphragm (Picture_01 (1)). 2. Insert desiccant packs (Picture_01 (2)) into new service covers with diaphragm and seal with protective grille and bolt down (Picture_01 (3)). Note: One desiccant pack is required for each small service cover, and two desiccant packs are required for each large service cover. 3. Stick the supplied diaphragm onto the new service cover and attach at the headlamp. Note: The bonding surface must be clean and dry. 4. If the headlamp housing has an additional 2nd diaphragm, this must be covered over with masking tape. Note: The bonding surface must be clean and dry. To ensure that the desiccant pack (absorption) acts effectively, the headlamp has to be air-sealed. Observe or check the following points for this: 1. Seals at the central connector must all be present and correctly fitted (Picture_02). 2. The new transparent diaphragm must be correctly bonded (Picture_03). 3. Check headlamp housing for any external damage.
- 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
- 11005313Complaint Check engine light on and fault code P019185 current or stored in MED41 control unit. Adaptation and misfire faults may also be stored. Vehicle may enter limp home mode. Cause False detection of rail pressure sensor out of range. Remedy Update software of engine control module N3/10. Reset mixture adaptation and clear fault codes.
- 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).
- 10253708In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA (MBUSA) is extending the coverage for the Fuel System Control Module (FSCM) software on your vehicle from the original New Vehicle Limited Warranty of 4 years / 50,000 miles to 1 S year: / 150,000 mile: (whichever occurs: first), and applies to the vehicle regardless of ownership. Why the warranty extension? On certain Model Year 2019 - 2021 A/CLA/ GLA/GLB/ GLE and GLS-Class vehicles, the FSCM software for the fuel pressure sensor and temperature plausibility checks may not meet specifications. As a result, the check engine Malfunction Indicator Lamp ('MIL') might illuminate. Any repair: under this warranty extension must be performed by an authorized Mercedes-Benz dealership. If your preferred authorized Mercedes-Benz dealership performs a diagnosis and confirms that your vehicle has the issue, the repair will be performed at no cost to you. This extended warranty does not apply to any other components or conditions beyond the ones mentioned above, and standard warranty terms apply, including the exclusions with respect to extra expenses, as identified in the Service and Warranty Information booklet. We hope you are enjoying your Mercedes-Benz vehicle and we apologize for any inconvenience this may have caused.
- 10253703This is to notify you of the Service Campaign OTA update for the MBUX system software in 750,313 Model Year (MY) MY19-24 A-Class, CLA, CLS, E-Class, EQB, GLA, GLB, GLC, GLE, GLS, GT 4-door (177, 118, 257, 213, 238, 243, 247, 253,167, 290 platform) vehicles. The vehicles will not be visible or flagged in VMI or EVA. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY19-24 A-Class, C-Class, CLA, CLS, E-Class, EQB, GLA, GLC, GLE, GLS, GT 4-door (177, 118, 257, 213, 238, 243, 247, 253, 167, 290 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 the Line Traffic Information and Point of Interest (POI) features. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customer's vehicle free of charge and do not require a dealer visit. No customer letter will be mailed for this OTA software update.
- 10249726Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz, has determined that in certain MY 2017-2021 C-Class, CLA, CLS, E-Class, GLC, GLE, GLS, AMG GT, S-Class, SL, and SLC (205, 117, 257, 213/238, 253, 166/292, 190/290,217/222, 231, 172) vehicles, the software of the communication module does not correspond with the latest series production configuration. This free of charge update includes quality-enhancing optimizations for the communication module to improve the system stability and better availability of the Mercedes me services. The update is downloaded and installed in the background. This process takes approx. 15 minutes. During the installation, the system can be used without restrictions. The new software will be active after the vehicle has been switched off. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge without an additional workshop visit via the data link of the communication module. All customers will be mailed a letter informing them of this software update.
- 10249540Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2019-2023 A-Class, CLA, E-Class, G-Class, GLA, GLB, GLC, GLE, GLS, and S-Class (177, 118, 238, 463, 247, 253, 167, and 222 platform) vehicles, the communication module system software does not correspond with the latest series production configuration. The communication module system will receive an OTA update to improve system stability and availability of Mercedes me services. 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. A letter will be mailed to all customers informing them of this OTA software update.
- 10249495Noises in the steering column area when steering. Under analysis. Check which area of the steering column the noises occur in. Do the noises tend to occur at the bottom in the driver footwell or do they tend to occur in the area of the steering column switch module (MRSM/SCCM)? If the noises occur in the area of the MRSM/SCCM, work through the following points: - Loosen screws of the MRSM/SCCM and steering wheel, re-align the MRSM/SCCM, and re-fasten the screws (see WIS). Sometimes there is stress at the MRSM/SCCM and noises occur. - If noises continue to occur, swap the MRSM/SCCM into a vehicle without any (noise) complaints. - If the noises occur with the MRSM/SCCM complained about when it is in the vehicle without a complaint (donor vehicle), the MRSM/SCCM can be replaced. - If noises also occur in the customer vehicle with the MRSM/SCCM from the reference vehicle, the MRSM/SCCM is not the cause and must not be replaced. Notes: - When installing the MRSM/SCCM, make sure that no damage occurs! - Only disassemble and mount all component parts in the "straight-ahead position" (see also WIS). - Please refer to this LI in the "Notes" section of the warranty claim!
- 10249482The steering wheel generates grinding noises between the steering wheel and steering column switch module during steering maneuvers See example file in the attachments area: Lenkrad-Schleifgerusch_SteeringWheel-GrindingNoises.mp4 The plastic cover on the back of the steering wheel is not positioned correctly and may therefore rub against the steering column switch module Please use the following noise files for the damaged part analysis: 1. Grinding noise | pot. cause: steering wheel | see attachment: Lenkrad-Schleifgerusch_SteeringWheel-GrindingNoises. mp4 2. Creaking/cracking noise | pot. cause: steering column switch module | see attachment: MRSM-Schleifgerusch_ SCCM-GrindingNoises.MOV If the noise is due to the steering column switch module, please use LI46.10-P-077314. Check for grinding areas on the steering wheel: Please check the covers on the rear for protrusion and, if necessary, remount. 1. Mask off openings on back of steering wheel with adhesive tape 1. Mark the back of the steering wheel with colored chalk (see Picture 1) 2. Mount steering wheel on steering column switch module and turn the steering wheel from left lock to right lock ten times. 3. The chalk will now have disappeared in the areas where there is rubbing (see Picture 2) Warning: Ensure that no cables and visible areas of the steering wheel are damaged. The abrasive excess material on the back of the steering wheel must be carefully removed with a Dremel tool. Tip: You will need to remove approx. 0.1 mm to 0.3 mm of material (example: Picture 3) Make sure that none of the ground-off material gets into the steering wheel. After removing the material, clean the entire back of the steering wheel with a 1% soap solution.
- 10248203Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY19-23 A-Class, CLA, CLS, E-Class, EQB, GLA, GLB, GLC, GLE, GLS, AMG GT (177, 118, 257, 213, 238, 243, 247, 253,167, 290 platform) vehicles, the head unit software does not correspond to the current series production configuration. The head unit will receive an OTA update to optimize the "Live Traffic Information" service for the navigation system. Additional product improvements including infotainment system robustness will be implemented. The software update will be downloaded in the background. The subsequent installation takes roughly 45 minutes and requires the customer's consent in the vehicle. During installation, the system can be used without restriction. The new software will be active after the vehicle has been switched off. 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.
- 10248195Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY19-23 A-Class, C-Class, CLA, CLS, E-Class, EQB, G-Class, GLA, GLB, GLC, GLE, GLS, AMG GT, S-Class (177, 205, 118, 257, 213, 238, 243, 463, 247, 253, 167, 290, 217, 222 platform) vehicles, the communication module system software does not correspond with the latest series production configuration. The communication module will receive an OTA update to improve the system stability and allow for better accessibility of Mercedes me services. 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.
- 10248162Crease formation on genuine leather seat covers in vehicles with low mileage Objects left on the seats for extended periods of time (pressure marks). Objects wedged between the seat backrest and seat cushion (e.g. seat belt buckle). Light initial creases due to vehicle handling. Light creases in the outer covers originating from the production process (missing finish). Heat treatment of the seat covers using heat gun and plastic wedge. Be very careful to not overheat the seat material!
- 10246281Fault code P06DA00 is found current or stored in engine control unit. Check engine light may be activated. Various causes Up to Model year 2018 Fault code P06DA00 can be disregarded if not activating the check engine light, unless otherwise specified in the guided test. The vehicle continues to operate as designed. Further causes should be investigated if complaint of check engine light is received. If fault code P06DA00 is activating the check engine light, update software of the ME control unit. No further repairs needed if the code no longer activates check engine light after 2 drive cycles. Model year 2019 and later Fault code P06DA00 will activate check engine light as of model year 2019. No driveability concerns will be observed, only illumination of the CEL. This fault code indicates high resistance or open in the circuit to Y130 oil pump control valve. Perform guided test for component Y130 under list of tests in ME. Diagnose location of high resistance or open in Y130 circuit and repair as necessary. Warranty claims submitted without supporting guided test results may be subject to debit.
- 10244837The "SOS nonfunctional" message appears sporadically in the instrument cluster of the vehicle. The fault code B129C00 is stored in the control unit log. The message occurs in particular after the vehicle has been non-operational for an extended period of time; the message then disappears of its own accord after a few minutes. No functional limitation to the emergency call system is to be expected. Software error in N112/9 control unit for telematics services (HERMES). Software update for control unit N112/9 - Control unit for telematics services (HERMES) to software release E522.8. If, against expectations, the erroneous display of the message in the instrument cluster continues to occur following the update, please create a TIPS case.
- 10241790The Mercedes me connect services cannot be activated. The remote status data does not update. Error in N112/9 - control unit for telematics services (HERMES). In the HERMES control unit log, under the "URL" tab, the value DEFAULT is stored for "atpServerUrl" and/or "rcsServerUrl". Please carry out a re-commissioning of the control unit N112/9 - Control unit for telematics services (HERMES), which includes both a software update as well as coding. The fault will be rectified by the newly included coding. As a result of the software update to the current software of the control unit N112/9 - Control unit for telematics services (HERMES), this fault will no longer occur in future.
- 10241527Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2018-2023 C-Class, EQE, EQE SUV, EQS, EQS SUV, GLC, GLE and S-Class (206, 295, 294, 297, 296, 254, 167 and 223 platform) vehicles, the communication module software does not correspond with the latest series production configuration. The update is free of charge and will be carried out in the background. The installation will eliminate software errors for a better entertainment experience. The update will show after the ignition has been cycled. MBUSA will conduct an OTA service campaign. A workshop visit for the customer is not required since remote software updates are automatically downloaded and installed in the customers vehicle. The OTA may be validated as successful on the customers Mercedes Me connect app under Over-the-Air Vehicle Updates as Update for the communication module. If the OTA is successful it will show a green installed and date of installation in the Over-the-Air update section.
- 10238424In the MBUX weather app, the temperature is displayed in the wrong unit (Fahrenheit instead of C, or vice versa). Temperature setting in Mmc mobile application settings incorrect Remedy Adjust the setting in the Mercedes me connect app via mobile phone (settings -> units)
- 10235667Complaint Ambient lighting malfunctions sporadically, mainly in the Ocean Blue color value and with animation "ON". After the next ignition cycle, the ambient lighting functions again correctly. Cause Software in coupling elements (EKE) faulty. The coupling element software cannot be updated in After-Sales. Remedy In a complaint case, replace the respective wiring harness (coupling elements are installed on the wiring harness) for ambient lighting.
- 10231032Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. E.g. when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by double-clicking on the button instead.
- 10227143Complaint Squeaking noise from area of input shaft of electric steering Cause Inadequate lubrication. Remedy Grease/lubricate sealing area of input shaft. The steering components can be greased/lubricated while they are still installed
- 10225807Complaint Chirping or tapping noise originating in area of front crankshaft pulley when engine cold. Noise may lessen as engine reaches operating temperature. Attachments File Description M260 noise.mp4 Noise example Cause Harmonics from timing chain drive. Remedy Replace timing chain tensioner with part A2600502000. Note: This noise will not cause damage to the engine or other symptoms. The chain tensioner should only be replaced in the event of a customer complaint.
- 10225805Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz, has determined that on certain MY 2019-2020 A-Class and CLA-Class (118 and 177 platform) vehicles, the transmission control unit software does not correspond with the current series configuration. The possibility exists that the vehicle does not start and the fault message vehicle at risk of rolling and transmission not in P position is incorrectly shown. Upon cycling the ignition the vehicles function could be restored. What Were Doing MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the transmission control unit software
- 10222481Complaint Customer states after a bus sleep the SiriusXM category changes from "My Favorites" to "All Stations" or a different category. Sometimes, the "My Favorites" category will be unavailable for the entire drive cycle. Cause Current MBUX Multimedia System (A26/17) software release Remedy Software update of MBUX Multimedia System (A26/17) to E905.4 (in development). This document will be updated once the software is released.
- 10222464Complaint Vibrations in steering at speeds lower than 30 mph. Possible when turning and also partly noticeable after changing to winter or all-season tires. Cause Controller stability of steering software, caused by reduced friction in steering (tolerance for production + running-in characteristics). Remedy Software update available in 1st quarter of 2023 (adaptation of stability limits)
- 10219265Complaint Vibrations in steering at speeds lower than 30 mph. Possible when turning and also partly noticeable after changing to winter or all-season tires. Cause Controller stability of steering software, caused by reduced friction in steering (tolerance for production + running-in characteristics). Remedy Software update available in 1st quarter of 2023 (adaptation of stability limits)
- 10217163Complaint The Apple Carplay interface cannot be controlled via the center console touchpad or the right-hand steering wheel touchpad. Cause A setting on the iPhone may prevent control via the touchpad Remedy To remedy on the affected iPhone, navigate to "Settings" -> "Accessibility" -> "Touch" and turn the "BackTap" option OFF.
- 10217159Complaint - Vehicle cannot be unlocked/ vehicle does not start - Display message in instrument cluster "Battery - Start Engine - see Operator's Manual Cause Root cause is a bus keepawake in either the Headlight control unit or in one of the following: ALC, IC, SAM, PTCU, ESP. Additionally, the quick test will show U116000 "A bus keepawake control unit has been detected" in the electronic ignition switch (EZS) control unit for this root cause. Remedy Eliminate bus keep awake issue flash new software where available:
- 10217158Complaint Noises from the area of the steering column. - Creaking - Squeaking - Chattering - Humming - Grinding Cause At present, there are no known noise problems with the steering column. Remedy Check surrounding area of the steering column for possible noises. - Instrument panel support - Steering column switch module If the cause of the noise can be narrowed down to the steering column, create a PTSS case
- 10215220Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz, has determined that on certain MY 2019-2020 CLA-Class, A-Class, and GLB-Class (118, 177, and 247 platform) vehicles, the transmission control unit software may not correspond to current product specifications. It is possible that the vehicle may switch to coasting mode during deceleration or rolling when engaged in drive mode E. In drive mode E, coasting operation is displayed in the instrument cluster as D and may be green instead of white. When exiting coasting mode, the N drive mode instead of D may be activated. The current drive mode will be displayed in the instrument cluster. What Were Doing MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the transmission control unit software.
Every Mercedes-Benz Cla 250 model year
Bars are owner complaints, dots mark years with recalls. Select a year to open its report.