https://plaincars.com/make/mercedes-benz-s550 New NHTSA complaints and recalls filed for the Mercedes-Benz S550. en-us Sun, 18 Oct 2026 06:13:05 GMT https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2171791 Fri, 30 Jan 2026 00:00:00 GMT I loss my electric steering assist!!! Takes 2 gorillas to turn the wheel i was able to stop without crashing into anything https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2142686 Fri, 24 Oct 2025 00:00:00 GMT We almost got into crash the other day, our 8-year-old kid got our attention that rear seatbelt got very loose and did NOT retract back at all. he almost hit his head. when I asked him if it has been like this he said no, it was tight when I buckled it in. We tried several times to retract it manually with no luck. I checked online and I have seen people complaining about the same thing. we have b https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2139802 Tue, 14 Oct 2025 00:00:00 GMT The contact owns a 2016 Mercedes-Benz S550. The contact stated that while driving at an undisclosed speed, the power steering failure warning light illuminated. The contact stated that the steering wheel seized. The contact stated that he was lucky to have been driving the vehicle in front of the residence and not on the highway. In addition, the contact stated that it was very difficult trying to https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2119339 Mon, 11 Aug 2025 00:00:00 GMT 2016 S550 front roof panel issues. Adhesive issues. https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2117483 Tue, 05 Aug 2025 00:00:00 GMT The contact owns a 2015 Mercedes-Benz S550. The contact stated that while driving approximately 45 MPH and approaching a stop, the vehicle experienced a loss of automotive power. Several unknown warning lights were illuminated. There was an abnormal ticking sound coming from the engine, and the brakes squeaked while turning. While refueling the vehicle, there was fuel leaking from the vehicle. The https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2117484 Tue, 05 Aug 2025 00:00:00 GMT The contact owns a 2015 Mercedes-Benz S550. The contact stated that while driving approximately 45 MPH and approaching a stop, the vehicle experienced a loss of automotive power. Several unknown warning lights were illuminated. There was an abnormal ticking sound coming from the engine, and the brakes squeaked while turning. While refueling the vehicle, there was fuel leaking from the vehicle. The https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2116070 Thu, 31 Jul 2025 00:00:00 GMT The contact owns a 2014 Mercedes Benz S550. The contact stated that while the vehicle was idling, there was an abnormal ticking sound coming from the vehicle. There was no warning light illuminated. The contact became aware of oil spots on the driveway after parking the vehicle. The vehicle was taken to a dealer where an inspection indicated that the oil filter housing was defective and needed to https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2109464 Sat, 12 Jul 2025 00:00:00 GMT Steering wheel will move in and out, but has stopped moving up and down. The steering wheel is stuck in the UP position. This has caused me to readjust all my seat settings and has made it more difficult to see the dash. https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2101050 Mon, 16 Jun 2025 00:00:00 GMT Started car in parking lot and warming light read zero air in right front tire. No prior warning. Checking tire for any road hazard - nails or other potential punctures but none were present but the tire had a hole just below the wheel that had blown out. The tire is a Pirelli P Zero 245/40R20 Run Flat. Was able to drive it to Tire Discount the next day to replace the tire. Manager checked tire an https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2101051 Mon, 16 Jun 2025 00:00:00 GMT Started car in parking lot and warming light read zero air in right front tire. No prior warning. Checking tire for any road hazard - nails or other potential punctures but none were present but the tire had a hole just below the wheel that had blown out. The tire is a Pirelli P Zero 245/40R20 Run Flat. Was able to drive it to Tire Discount the next day to replace the tire. Manager checked tire an https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2097910 Thu, 05 Jun 2025 00:00:00 GMT The contact owns a 2015 Mercedes-Benz S550. The contact stated that while operating the vehicle, the air bag warning light remained illuminated, with the message "Front Drivers Air Bag Malfunction - Service Required" displayed. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure, but no assistance was provided. The contact was informed th https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2089979 Wed, 07 May 2025 00:00:00 GMT 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 drivi https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2086970 Tue, 29 Apr 2025 00:00:00 GMT The contact's daughter owns a 2011 Mercedes-Benz S550. The contact stated that while the vehicle was parked in the garage, the contact noticed that the air suspension had collapsed. The dealer was notified of the failure and informed the contact that it was a known failure. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approxim https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2083668 Thu, 17 Apr 2025 00:00:00 GMT Brought my vehicle to my mechanic because of noise that recently appeared in my car. To my surprise the mechanic stated that my engine is completely failing and would require an entire new engine. I purchased this car less than two years ago with an estimated 79,000 miles. Vehicle currently has an estimated 112,000 miles. Never missed a service interval for the vehicle. Now several components of t https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2083669 Thu, 17 Apr 2025 00:00:00 GMT Brought my vehicle to my mechanic because of noise that recently appeared in my car. To my surprise the mechanic stated that my engine is completely failing and would require an entire new engine. I purchased this car less than two years ago with an estimated 79,000 miles. Vehicle currently has an estimated 112,000 miles. Never missed a service interval for the vehicle. Now several components of t https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2081197 Tue, 08 Apr 2025 00:00:00 GMT Roof panel between windshield and panoramic sunroof has developed fine hairline fractures on the polycarbonate panel. Why wasn't my vehicle included in recall 21V-197? Thanks for your time. https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2072320 Sun, 09 Mar 2025 00:00:00 GMT The steering wheel became difficult to control.Also,steering wheel module waring light came on. https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2070886 Tue, 04 Mar 2025 00:00:00 GMT The rear seatbelts do not retract to restrain the passenger. They also don't retract after the passenger has exited the vehicle. https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2065432 Thu, 13 Feb 2025 00:00:00 GMT Cylinder wall 2 and 3 scorn horribly. Coolant leaking into cylinder 2 & 3. Dealer recommendation of new motor due to bad block. German Auto Works and CarStoreUSA Wichita KS both recommend new motor and have advised of many of same motors being recalled by Mercedes Benz. I also spoke with Mercedes Benz North America. The heads were replaced in 2022 already and have under 10k miles on motor since re https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2055231 Sun, 12 Jan 2025 00:00:00 GMT FUALTY DRIVE SHAFT PROBLEM https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2055232 Sun, 12 Jan 2025 00:00:00 GMT FUALTY DRIVE SHAFT PROBLEM https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2049460 Thu, 19 Dec 2024 00:00:00 GMT The contact owns a 2017 Mercedes-Benz S550. The contact stated while the vehicle was in for routine maintenance, the mechanic discovered that the front driver's side CV-boot had cracked and was leaking oil. The contact was advised that the CV-boot could cause the front axle to eventually fail. The contact was advised that the front axle needed to be replaced. The vehicle was not yet repaired. The https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2028453 Sun, 29 Sep 2024 00:00:00 GMT RIGHT FRONT TIRE 245/45R19B 102.H.M.S I HAD A MAJOR BLOWOUT. THE SIDEWALL OF THE TIRE HAD A WHOLE THE SIZE OF A RETANGULAR BRICK. i COULD HAVE LOST CONTROL AND HURT MYSELF AND OTHERS. I HAD MY BRAKES REPLACED AND THE TIRES ALIGNED AND BALANCED A COUPLE OF DAYS BEFORE. THE MECHANIC SAID IT WAS UNUSUAL FOR THE TIRES TO SHOW WEAR ON THE OUTSIDE AND INSIDE TREAD. AT 75 MPH IT WAS LIKE A LOAD EXPLOS https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2027124 Tue, 24 Sep 2024 00:00:00 GMT I went to replace my low beam and high beam bulbs on the passenger side and found that the wiring for the low beam had 0 insulation on it and I installed the new high beam bulb and the wires starting arcing causing the car to turn off the high beams and start smoking from the headlight assembly. https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2027125 Tue, 24 Sep 2024 00:00:00 GMT I went to replace my low beam and high beam bulbs on the passenger side and found that the wiring for the low beam had 0 insulation on it and I installed the new high beam bulb and the wires starting arcing causing the car to turn off the high beams and start smoking from the headlight assembly. https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2025685 Wed, 18 Sep 2024 00:00:00 GMT The contact owns a 2015 Mercedes-Benz S550. The contact stated while driving at an undisclosed speed, the contact noticed a squeaking sound coming from the undercarriage of the vehicle. The vehicle was taken to the dealer where it was diagnosed with suspension strut spring control arm joint. The contact was informed that the suspension strut spring control arm joint needed to be replaced. The vehi https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2024445 Thu, 12 Sep 2024 00:00:00 GMT Rear left seat belt is stuck and won’t retract. Seat has not been used much. Vehicle is a 2016 with 65,000 miles. https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2021286 Mon, 02 Sep 2024 00:00:00 GMT Unknown https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2019540 Mon, 26 Aug 2024 00:00:00 GMT I purchased this vehicle in July 2020. I did a through check for recalls, warranty problems and could not identify any with this vehicle. From the get go the check engine light would come on. I checked the codes and they indicated an "electrical fault on bank 1, oxygen sensor 1. I replaced the wiring harness on that sensor as well as the sensor. From then until now the car would code weekly about https://plaincars.com/make/mercedes-benz-s550 https://plaincars.com/make/mercedes-benz-s550#complaint-2019541 Mon, 26 Aug 2024 00:00:00 GMT I purchased this vehicle in July 2020. I did a through check for recalls, warranty problems and could not identify any with this vehicle. From the get go the check engine light would come on. I checked the codes and they indicated an "electrical fault on bank 1, oxygen sensor 1. I replaced the wiring harness on that sensor as well as the sensor. From then until now the car would code weekly about