Mercedes-benz Sl-class Electrical Problems
52 owner complaints filed with NHTSA across 13 model years.
Complaints by Year
Worst year: 2003. Best year: 2023.
Owner Reports
A representative sample of complaints filed with NHTSA.
I'm reporting a SERIOUS SAFETY ISSUE affecting all Mercedes-Benz R230 series SL roadsters, model years 2003–2012, of which approximately 85,000 were sold in the United States: • There are numerous reports on R230 SL owners' online f...
I purchased this vehicle in a private sale in September 2025. The battery Warning light was on and the radio was not working either. I had the vehicle inspected by the Mercedes dealer and was told the batteries were being drained because...
My mom and I were in her car brand new Mercedes adaptive cruise was on the car started to act up with all the warning lights again, which shut all safety systems down air back seatbelts, adaptive cruise, Tronics and the engine wall betwe...
To who may this concerned, I have a 2003 Mercedes SL500 and recently found my battery control module caught on fire and burnt a section of my car. I have tried reaching out to Mercedes directly first and they said the car is 20 years ago...
The battery control module (known as the BCM or BNS) failed, triggering a fire. The incident occurred while the vehicle was parked in a garage and had not been operated for several weeks. The fire consumed the module, insulation on wirin...
It appears the BCM (Battery Control Module) caught fire and burned a significant portion of the trunk and associated wiring.
The 2003-2006 R230 series seem to have a problem with the BCM (Battery Control Module) as start an electrical fire in the trunk. Very common issue and a safety hazard - this is what happened with my car. Vehicle has dual battery, starter...
TL* THE CONTACT OWNS 2005 MERCEDES BENZ SL500. THE CONTACT STATED THAT THE WHOLE RIGHT SIDE OF THE VEHICLE TRUNK CAUGHT ON FIRE WHILE THE VEHICLE WAS PARKED. THE CONTACT STATED THAT THE FIRE STARTED IN THE UPPER RIGHT FRONT AREA OF THE T...
NOV 14 EARLY MORNING A FIRE STARTED IN THE TRUCK OF MY CAR. COMPLETELY DESTROYED THE CAR. WAS PARKED IN MY GARAGE. TRUCK WAS EMPTY. HAD JUST USED CAR MORNING OF NOV 13 AND ALL WAS FINE. *****PLEASE SEE IMAGES IMG_1733, IMG_1734 A...
THIS VEHICLE CAUGHT FIRE ON ITS OWN WHILE PARKED IN A LOCKED GARAGE. THE FIRE WAS IN THE TRUNK AND INVOLVED VARIOUS ELECTRICAL AND MECHANICAL COMPONENTS AND WIRING HARNESSES. THE CAR FILLED WITH DENSE SMOKE WHICH COATED EVERYTHING WITH...
TL* THE CONTACT OWNS 2003 MERCEDES SL500. THE CONTACT STATED THAT WHILE ATTEMPTING A LEFT TURN, THE CONTACT WAS STRUCK IN THE FRONT OF THE VEHICLE. THE AIR BAGS DID NOT DEPLOY. THE CONTACT SUSTAINED MINOR INJURIES AS A RESULT OF THE CRAS...
TL* THE CONTACT OWNS A 2005 MERCEDES BENZ SL-500. THE CONTACT STATED THAT WHILE DRIVING 25 MPH, HE FELL ASLEEP BEHIND THE WHEEL AND CRASHED INTO TWO PARKED VEHICLES. THE CONTACT'S VEHICLE PROCEEDED TO FLIP OVER,HOWEVER THE AIR BAGS DID N...