2008 Mercedes Benz S550

Owner complaints

What owners report most

1. Electrical system4
2. Tires4
3. Suspension2
4. Fuel system, gasoline2
5. Power train2
6. Engine2
7. Unknown or other1
8. Vehicle speed control1
9. Air bags1
10. Wheels1

Latest complaints

• May 7, 2025OH
  Engine
  I’m reporting a serious safety issue with the balance shaft sprocket in my Mercedes-Benz S550 (M273 engine, 273.968). This is a known defect that causes the sprocket to wear out far too early due to poor material design. When it wears, it throws off the engine timing, leading to check engine…

  I’m reporting a serious safety issue with the balance shaft sprocket in my Mercedes-Benz S550 (M273 engine, 273.968). This is a known defect that causes the sprocket to wear out far too early due to poor material design. When it wears, it throws off the engine timing, leading to check engine lights, rough idling, reduced power, and even stalling. In some cases, the engine can shut down while driving, which is a major safety risk. Thousands of people have experienced this exact problem, and it’s all over Mercedes forums, Reddit, and technical bulletins. Mercedes quietly updated the part in later models, which shows they knew the early ones were defective. Some people got repairs under warranty or “goodwill,” but most of us are stuck with thousands in repair bills for something that clearly shouldn’t have failed. This isn’t just a mechanical issue—it’s a safety concern. Imagine merging onto a highway or turning through an intersection when the engine loses power. That’s a real risk with this defect. Mercedes should be held accountable, and NHTSA needs to investigate and push for a recall before someone gets hurt or worse.

• Mar 14, 2024FL40,000 mi
  Electrical system · Engine
  The contact owns a 2008 Mercedes-Benz S550. The contact stated while driving 40-50 MPH, the vehicle was shuddering intermittently. The contact stated that the failure recurred while at a complete stop. The check engine warning light was illuminated. The contact stated that the failure had been…

  The contact owns a 2008 Mercedes-Benz S550. The contact stated while driving 40-50 MPH, the vehicle was shuddering intermittently. The contact stated that the failure recurred while at a complete stop. The check engine warning light was illuminated. The contact stated that the failure had been recurring intermittently. The vehicle was taken to an independent mechanic, where it was diagnosed that the wiring harness was causing an engine misfire. The mechanic related the failure to an unknown recall. The dealer was notified of the failure. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 40,000.

• Sep 28, 2023OK
  Tires
  We were traveling home and our TPMS indicated a tire failure. The PSI starting dropping rapidly. We took the tire off and found that only 4 " of rubber holding the back sidewall together on the tire. I then inspected the other tires on the car (which were purchased and installed at the same…

  We were traveling home and our TPMS indicated a tire failure. The PSI starting dropping rapidly. We took the tire off and found that only 4 " of rubber holding the back sidewall together on the tire. I then inspected the other tires on the car (which were purchased and installed at the same time) are showing signs of failure as well. All of the tires are 255-40-r19 We had a family of 4 in the vehicle at the time of the incident.

• Aug 28, 2023CA176,310 mi
  Electrical system · Power train
  The contact owns a 2008 Mercedes-Benz S550. The contact stated while driving 35-40 MPH, the message "SAFETY" was temporarily displayed on the instrument panel. Additionally, the contact stated while starting the vehicle on several occasions, the message " SAFETY " was displayed on the infotainment…

  The contact owns a 2008 Mercedes-Benz S550. The contact stated while driving 35-40 MPH, the message "SAFETY" was temporarily displayed on the instrument panel. Additionally, the contact stated while starting the vehicle on several occasions, the message " SAFETY " was displayed on the infotainment system screen. The check engine warning light was illuminated, and the messages "Active Head Lamp Inoperative" and "Service Required. Do Not Shift Gears" were displayed. The contact also stated that upon shifting into drive (D), the gear shift indicator displayed that the transmission was in park (P). The contact stated that the vehicle failed to shift into the intended gear and had become undrivable. An independent mechanic replaced the battery; however, the failure persisted. The mechanic informed the contact that the computer needed to be reset. The vehicle was not repaired. The used car dealer was notified of the failure. The Mercedes-Benz dealer and manufacturer were not notified of the failure. The failure mileage was approximately 176,310.

• Jun 18, 2020NY78,013 miCrash2 injuries
  Air bags · Seats › Front assembly › Head restraint
  TL* the contact owns a 2008 mercedes-benz S550. The contact stated that while stopped, the vehicle was suddenly rear-ended causing the vehicle's driver and passenger front seat head rest air bags to deploy. The contact stated that he sustained broken bones in his neck as well as injuries to his…

  TL* the contact owns a 2008 mercedes-benz S550. The contact stated that while stopped, the vehicle was suddenly rear-ended causing the vehicle's driver and passenger front seat head rest air bags to deploy. The contact stated that he sustained broken bones in his neck as well as injuries to his left elbow and back area. The front passenger received injuries to his neck and back area and was transported the hospital by ambulance while the driver drove his vehicle to the hospital. A police report was filed. The vehicle was taken to a local a body shop post incident who repaired the bumper amongst other parts of the rear of the vehicle. The vehicle was then towed to the dealer (mercedes-benz of wappingers falls (134 old post rd, wappingers falls, ny 12590 phone: (845) 298-0600) who performed the head rest air bags replacement, as well as, electrical and other repairs due to the collision. The manufacturer was made aware and opened a case regarding the matter. The contact was concerned with the force of the head rest air bags deployment. The approximate failure mileage was 78,013. *Dr*jb

• May 12, 2020TN148,000 mi
  Vehicle speed control
  P-rc-200808004 body control acceleration sensors...models 2001-2008 11/4/2008 - 200807001 re-code the software calibration number (scn)…

  P-rc-200808004 body control acceleration sensors...models 2001-2008 11/4/2008 - 200807001 re-code the software calibration number (scn) 11/04/2008 - 200803005 replace front sam s-sc-2012070002 retrofit adapter wiring harness on camshaft adustment solenoids models 2005-2011 s-rc-200807001 revision to step z, in work procedure recode the software calibration number (scn). *tr

• Jan 1, 2020NY69,000 mi
  Electrical system · Unknown or other · Wheels

  Even change to new tires, the air pressure up to 37 and always after 1 week or so, down to 33, complain and change tire and still have the same result. you could only check the tire pressure after you run for a while. massage chair, after operation and all the sudden it stop. clock in the cabin doesn't change even you set it up and the internal said the right time and the front doesn't change

• Jan 2, 2019CA70,000 mi
  Fuel/propulsion system

  My vehicle has a strong gas odor while driving but particularly when the vehicle IS static or parked. This smell IS so strong that I cannot sit in the car and my clothes reak of the smell. There has not been any external gas leakage or performance issues with the car. Only the gas ordor that has given me a headache and makes me nauseated. The car only has 70,000 miles on it.

• Sep 4, 2018CA91,000 mi
  Suspension

  I had to replace both front air shocks around 90,000 miles. No off road driving. both air struts leaked within 4 months . Suspension warning light cane on first. Then a message to stop the car and not operate.

• Feb 21, 2017FL91,000 mi
  Fuel system, gasoline
  TL* the contact owns a 2008 mercedes benz S550. The contact stated that the vehicle had experienced an abnormal fuel odor. The vehicle was taken to the dealer where it was diagnosed that the fuel tank was fractured and needed to be replaced. The vehicle was not repaired due to the part being on…

  TL* the contact owns a 2008 mercedes benz S550. The contact stated that the vehicle had experienced an abnormal fuel odor. The vehicle was taken to the dealer where it was diagnosed that the fuel tank was fractured and needed to be replaced. The vehicle was not repaired due to the part being on back order. The manufacturer was notified of the failure. The contact had referenced nhtsa campaign: 12v557000(fuel system, gasoline) as a possible solution to the failure however the vin was not included. The failure mileage was approximately 91,000.

• Jun 26, 2015SC70,000 mi
  Suspension

  TL* the contact owns a 2008 mercedes benz S550. The contact stated that the front end of the vehicle lowered, indicating that there was suspension failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 70,000. Updated 09/01/15*lj updated 12/7/2015*js

• Apr 13, 2015NJ87,609 mi
  Tires
  I purchased 4 new 255/45/zr18 extremecontact dws about 13 months ago and now all 4 tires have a bulging bubble on the sidewalls. Of course I brought it back from where I purchased it from and they blame it on pot holes, road hazards. I currently cannot drive the vehicle in fear that I might have a…

  I purchased 4 new 255/45/zr18 extremecontact dws about 13 months ago and now all 4 tires have a bulging bubble on the sidewalls. Of course I brought it back from where I purchased it from and they blame it on pot holes, road hazards. I currently cannot drive the vehicle in fear that I might have a blow out. I have purchased many tires before that were not continental and never experienced what im going through now. Let see how long it will take to be contacted with some help or what excuse they going to come up with. *tr

• Mar 22, 2014FL
  Tires
  Michelin pilot sport a/s plus 255/45zr18 99Y as+ installed on 2008 mercedes S550. Tires tread IS "chunking" with 18,000 miles of use. Purchased from costco. I have contacted costco. Was told it was "normal", complained it cannot be, we negotiated back and forth on an adjustment. It wasn't…

  Michelin pilot sport a/s plus 255/45zr18 99Y as+ installed on 2008 mercedes S550. Tires tread IS "chunking" with 18,000 miles of use. Purchased from costco. I have contacted costco. Was told it was "normal", complained it cannot be, we negotiated back and forth on an adjustment. It wasn't satisfactory. I was offered for a discount price the "new" version of the tire, i.e. Pilot sport a/s 3. I have read the other complaints on nhtsa site. They are similar to mine. I spoke to 4 different costco employees, three different michelin yet, I could not fine anyone at costco or michelin that can assure me with an official michelin statement the problem has been corrected with the new pilot sport 3. I will not pay to have new tires installed at a discount and have the same thing happen again.these tires are a potential safety hazard. *tr

• Aug 27, 2013CA59,300 mi
  Tires
  The tire tread on the michelin pilot sport a/s plus shreds or crumbles. michelin calls it "chunking" and said it was due to the compound used to make the tire. the compound has since been modified. this problem occurred on my girl friend's 2009 mercedes c-series sedan and all four tires were…

  The tire tread on the michelin pilot sport a/s plus shreds or crumbles. michelin calls it "chunking" and said it was due to the compound used to make the tire. the compound has since been modified. this problem occurred on my girl friend's 2009 mercedes c-series sedan and all four tires were replaced in or about november 2012. I noticed the same problem occurring to the front tires on my mercedes S550 at just over 24,000 miles of use. the tire has a 45,000 tread-wear warranty. the tires were purchased in november 2010. the michelin dealer and michelin acknowledge this IS a known problem. the tread splits or cracks at the sipes and falls off, affecting traction and possibly risking a catastrophic failure. michelin said the problem occurs on only certain model vehicles and does not intend a recall. these tires were recommended by michelin for my vehicle, but it appears they may no longer recommend it. they no longer recommend or make them for my girl friend's vehicle. *tr

• Aug 23, 2013GA57,000 mi
  Electrical system · Equipment adaptive/mobility
  I was in unfamiliar area. Remote key would not operate. When using small key to enter vehicle car siren would not quit blaring and .new batteries did not help. Mercedes responder told me I had inoperative "dead" key. Car of course was inoperative. No way to move car from area. Could not secure…

  I was in unfamiliar area. Remote key would not operate. When using small key to enter vehicle car siren would not quit blaring and .new batteries did not help. Mercedes responder told me I had inoperative "dead" key. Car of course was inoperative. No way to move car from area. Could not secure car. I had rbm in atlanta on cell phone entire time. about hour later someone took me to my home for spare key. This worked. Key was as mercedes responder told me...... Dead. the mercedes keys are unsafe and undependable. Need to be recalled. Mercedes would not replace "dead" key per kyrus frames at rbm in atlanta. because my car had 57000 miles on it and out of warranty. key must be recalled due to safety concern there IS no way to operate a "dead" key. mercedes responder told me that he sees it all the time. what if??? I had been miles from home? Unsafe area? Compromising situation?this IS unacceptable for $100,000 car. I could be dead. just provide a workable key mercedes. *tr

• Mar 11, 2013NJ101,300 mi
  Power train
  Mercedes benz, S550, 4matic, 2008. I was stopped at a red light. when the light turned green and I was moving forward at about 15-20 miles per hour, the car came to a sudden stop. the vehicle behind me almost ran into my back since there were no brake lights illuminated when this unfortunate…

  Mercedes benz, S550, 4matic, 2008. I was stopped at a red light. when the light turned green and I was moving forward at about 15-20 miles per hour, the car came to a sudden stop. the vehicle behind me almost ran into my back since there were no brake lights illuminated when this unfortunate malfunction took place. I immediately looked the control panel for any malfunction alarm and there were none. the root cause of the problem was front differential seize up without any warning. there were the right amount of oil in the reservoir so the problem was no due to lack of lubrication. the car was repaired by mb dealer and I was given a bill for (hold on to your pants) $8,252. I called mb customer service to find out if there are any recall on this malfunction. I was told none reported. I have a hard time believing that I am the only one with this problem. I almost came to a decision to sign over the title and have them sell the car to recover the repair cost. obviously the dealer IS not at fault here. however you would expect that a car of this caliber would be better designed and supported. as you have guessed I am unhappy with my mb. by the way if you are trying to sign on for mb online owner community and want to choose the username "unhappy", you can't. it IS already taken. try it with some #s. *tr

• Jun 26, 2011AZ41,000 mi
  Fuel system, gasoline

  Car stalled while driving on 10 fwy going from az to calif. Would not restart & was towed to palm springs mbz. Not open til mon 27TH. *tr

• Jul 2, 2009NY14,000 mi
  Equipment
  I got a blow out in the rear left side tire. I was doing about 40 mph and did not go over anything that I was aware of. I went to change the tire using the supplied tire and jack. the jack was very flimsy and after I raised the vehicle the jack flipped over causing damage to my car, however I…

  I got a blow out in the rear left side tire. I was doing about 40 mph and did not go over anything that I was aware of. I went to change the tire using the supplied tire and jack. the jack was very flimsy and after I raised the vehicle the jack flipped over causing damage to my car, however I narrowly avoided personal injury. there IS a plate under the vehicle at the jack contact point which also broke off the vehicle when the jack rolled over. the following are the defects I believe exist. 1. the jack IS extremely flimsy and IS difficult to set properly on the ground. 2.THE jack plate on the car apparently IS also not very stable. 3. The handle on the jack IS very short and requires an extreme amount of strength to lift car. (No leverage) 4. The lug wrench IS also very short and requires a lot of strength to loosen bolts, there IS absolutely no leverage. I estimate the damage to my vehicle, which I blame on the defective jack to be about $750.00. *Tr

• Jan 21, 2009AZ
  Service brakes, hydraulic
  I have 2008 mercedes S550. The car suddenly started making noise in the front and I called dealership. They told me the brakes are gone and even rotors are damaged. I had no indication all this time I was driving that the car had no brakes as no brakelights came on. Till the time I went to…

  I have 2008 mercedes S550. The car suddenly started making noise in the front and I called dealership. They told me the brakes are gone and even rotors are damaged. I had no indication all this time I was driving that the car had no brakes as no brakelights came on. Till the time I went to dealership no indication came as sensors are not working. IS it not unsafe to be driving on the highway 60 to 70 miles /hr with no break sensors . I called merc and the top two people robyn and tim in escalation dept tell me at first they are picking up the. Repair and then totally turned their backs and years and said to me it IS not a safety issue where the cars breaks are completely gone to the point the rotors are damaged and there IS mo indication. With a 100K car which has all these fancy features but brakes are not imo. *Tr

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.

• 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.
• 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.
• 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
• 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
• 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).
• 10252770As previously reported, to enhance the satisfaction of our customers, avoid further costs of litigation and return focus to its core businesses, Mercedes-Benz USA, LLC (MBUSA) has entered into a Settlement regarding claims relating to allegations that the 590 Mars Red paint available as an original, exterior color option for certain models of Mercedes-Benz vehicles may experience peeling, flaking, or bubbling of the exterior paint or clear coat. This Mars Red paint is sometimes referred to as Fire Opal. The purpose of this update is to alert you that: 1. The Settlement has received final approval. The Settlement will go into effect on March 11, 2024. As of that date, customers are eligible to receive extended warranty coverage under the Settlement. 2. Under the Settlement, an eligible customer might receive extended warranty coverage as of the date the vehicle is presented to your dealership OR certain customers might have validated Qualified Future Repair claims, making them eligible for a different level of coverage. To determine if a customer: (a) is eligible for extended warranty coverage; and (b) what level of warranty coverage is available to them, please refer to the Service Packages section in VMI/Netstar. 3. Damage code 21800 (damage type 00) must be used for warranty claims covered pursuant to the Settlement. Please note that you should only claim for the percentage of warranty repair cost reflected in VMI/Netstar (see below, e.g., for Period Two, claim only 50% of warranty repair cost). 4. Before the dealership agrees to perform any work: The customer should be given a Repair Order containing: (1) an estimate for the repair, (2) the portion covered under the extended warranty; and (3) the customers contribution amount for the repair, if applicable. The customer must agree to pay their contribution amount for the repair and sign the Repair Order before the repair is performed.
• 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!
• 10205225Headlamps fogged.
• 10202531Touch pad: Search lighting does not dim or does not turn on.
• 10186141NTG5.5: Incorrect time shown on instrument cluster, COMAND display, and analog clock
• 10181124Harsh engagement when changing gear range from P to D or R
• 10181123Harsh engagement when changing gear range from P to D
• 10177571Lamp unit fogged or droplets forming. Due to the vent openings, the lamp unit is an "open system". This means that acidic gases, moisture, dirt and exhaust gases can penetrate it. This can result in deposits on the diffuser and lens. Check housing cover of lamp unit for natural fogging or dew as per GI82.10-P-009047. . 1. If a reduction in the degree of fogging is visible, the desiccant packs can be used once the condensation has completely evaporated. 1.1. Order the required service covers by referring to the variant overview. 1.2. Remove lamp unit 1.3. Remove all grommets from vent openings. 1.4. Seal vent openings with sealing profile. Important: All openings must be sealed carefully for the pressure compensation membrane to work properly! 1.5. Remove existing service cover 1.6. Place desiccant packs in new service covers and bolt down 1.7. Stick new diaphragm onto specified surface on service cover [picture of service cover] Note: The bonding surface must be clean and dry. 06
• 10176670To enhance the satisfaction of our customers, avoid further costs of litigation and return focus to its core businesses, Mercedes-Benz USA, LLC (MBUSA) has entered into a settlement regarding claims relating to alleged mold and mildew type odors originating from the HVAC system in certain Mercedes-Benz vehicles. As part of the settlement, MBUSA has agreed to offer sliding-scale warranty coverage for certain vehicles diagnosed as having mold or mildew type odors originating from the HVAC system?although that coverage will not take effect until the settlement is judicially approved and other events occur; likely not until December 7, 2020 at the earliest (see below). If the settlement becomes effective, coverage will include cleaning of the evaporator and replacement of the HVAC filters
• 101766615 to 4 coasting downshift - shift quality concern with cold trans- mission oil on MODEL 217 or 222 in combination with ENGI- NE 278 and TRANSMISSION 722.9 without code 835/498
• 10167572If it is necessary to replace an HV battery, the return will only be accepted with the filled-out ?Analysis Sheet for Transportability of High-Voltage Batteries Form? accompanied by: , the removed part, the quick test printout, the BMS control unit log printout, the repair documentation and with all required documentation listed in Section E of the Form.
• 10167554Engine diagnosis warning lamp activated. Fault code P045600 "Very fine leak" or P044200 "Fine leak" stored in engine control unit.
• 10167006Engine diagnosis warning lamp active. Fault code 20BE1B and/or 20BD1B (The heating element of the AdBlue tank has a malfunction) is logged in the Blue-Tec control unit.
• 10166991Creaking noises from the area of the air suspension strut on the front axle when driving over bumps with the steering turned. Topic only reported from outer wheel until now.
• 10166978Engine diagnosis warning lamp lights up - Fault code entry (FC) 14A600 or 14A700
• 10166976Message in instrument cluster "DISTRONIC PLUSCurrently Unavailable - See Owner's Manual"
• 10166975This Customer 1 Action has been initiated because certain mbrace subscribers were recently contacted by mbrace informing them that they need to have an i-button call performed to ensure their mbrace device has registered with the Verizon Telematics systems. If the i-button call failed or if the customer was unable to perform the i-button call, the mbrace agent instructed the customer to make an appointment with their dealer to have the issue corrected and/or i-button call performed. The vehicles impacted range from model year 2002 to 2014.
• 10166107Seat belt height adjustment nonfunctional
• 10166106Grinding noises can occur in the backrest on active multicontour seats with the backrest under load and the seat ventilation switched on
• 10166102No inflation of one or more air cushions on the massage/multicontour/dynamic seat modules (driver, front passenger and rear) Bubble formation in one or more seats with massage/multicontour/dynamic seat modules (driver, front passenger and rear)
• 10166100Dynamic seat (DS) pneumatic pump / multicontour seat pneumatic pump makes noises.
• 10166099Pneumatic comfort systems with insufficient performance, entirely inoperative or leaky.
• 10166098Multicontour system fails during air release procedure. The system becomes operational again after an ignition change. Fault code 9E8900 is stored.
• 10166094Noises from lock of valuables/stowage compartment or from gap cover between seat and center tunnel.
• 10166086Squeaking/creaking noises from area of seat adjuster
• 10166079Creaking noises can occur when the side bolster bladders are inflated and deflated
• 10165854The trunk lid sometimes does not open completely and does not close (completely). This complaint is accompanied by the following symptoms: - Illumination of the trunk lid control button (S62/26) fails. - The ACTUAL value* of the trunk lid lock main catch switch (A85/5s1) indicates "closed" although the trunk lid is open. - Knocking against the trunk lid lock (A85/5) causes the light of the trunk lid control button (S62/26) to flicker and the ACTUAL value* of the trunk lid lock main catch switch (A85/5s1) to jump back and forth between the values "open" and closed". * The ACTUAL value of the trunk lid lock main catch switch (A85/5s1) can be found under the following path in Xentry Diagnostics: Xentry Diagnostics => Control unit => SAM-H (N10/8) => ACTUAL values => Trunk lid => Trunk lid lock main catch switch
• 10165853When on rough roads and with side loads applied to the center console (leg support) cracking noise may occur in the transition between the instrument panel and the center console.
• 10135628iPhone mobile phone: Various complaints after software update to iOS8
• 10135604Vehicle cannot be opened via Keyless-Go and radio remote control
• 10044222Mercedes benz: front or rear seat belt does not roll up correctly. Dirt deposits on the seat belt guide due to soiled seat belt. Also included models 169, f cell, 246, and 231. No model years given.
• 10044181Xentry: rattling/thumping noises from the area of the steering on rough roads or when driving over road undulations. No model years given. Also included models 168 and 172.
• 10040984Mercedes-benz: the vehicle jerks during light braking. The alternator engages too early during braking.

Every Mercedes Benz S550 model year

Bars are owner complaints, dots mark years with recalls. Select a year to open its report.