NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
80 reportsMileage unknown · Nov 29, 2023
Electrical SystemFire
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 and it could have not be a manufactured defect. Please I need help this problem could’ve bur…
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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 and it could have not be a manufactured defect. Please I need help this problem could’ve burn down my house or while I was driving. Mercedes requested I send them a letter in writing if I have to get the car inspected. Please setup and date so I can write them this is 100% liability on their brand as there is no schedule maintenance for a battery control module.
NHTSA ODI #11557470
Mileage unknown · Nov 27, 2023
Electrical System
I am concerned with the battery control module. I have noticed there has been a lot of incidents out there where the battery control module in the SL 500s have caught fire! I am concerned for my safety due to this defect!
NHTSA ODI #11556968
88,000 miles · Aug 22, 2023
Suspension
The contact owns a 2003 Mercedes-Benz SL500. The contact stated while driving at various speeds, the ABC warning light illuminated. Additionally, the message "Drive Carefully" was displayed. The vehicle was taken to an independent mechanic, where it was diagnosed that the ABC tandem pump, struts, and hoses needed to be replaced.…
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The contact owns a 2003 Mercedes-Benz SL500. The contact stated while driving at various speeds, the ABC warning light illuminated. Additionally, the message "Drive Carefully" was displayed. The vehicle was taken to an independent mechanic, where it was diagnosed that the ABC tandem pump, struts, and hoses needed to be replaced. The dealer was notified of the failure and informed the contact that they did not provide service for older vehicles. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 88,000.
NHTSA ODI #11540123
Mileage unknown · Sep 28, 2022
Suspension
ABC (Active Body Control) light keeps coming on and body goes up and down when I drove car. Light says do not drive. Mercedes would not take responsibility for this in spite there are so many complaints about this. Really irresponsible by Mercedes.
NHTSA ODI #11486932
Mileage unknown · Jul 20, 2022
Suspension
I was driving my car at 45 mph and suddenly, unexpectedly a red light flashed ABC do not drive. Smoke was coming from under the car and the front end of the vehicle collapsed downwardly. I had to call for a tow truck to take my vehicle to the MB dealership. I'm I am waiting for the prognosis. I've had numerous issues with the Al…
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I was driving my car at 45 mph and suddenly, unexpectedly a red light flashed ABC do not drive. Smoke was coming from under the car and the front end of the vehicle collapsed downwardly. I had to call for a tow truck to take my vehicle to the MB dealership. I'm I am waiting for the prognosis. I've had numerous issues with the All Body Control system. Expensive repairs in the $3000-$8000 range. This is a safety issue the breakdown happens abruptly and I was fortunate other cars weren't on the parkway with me. Otherwise a crash could gave occurred.
NHTSA ODI #11474844
126,000 miles · Jul 19, 2022
Service Brakes, Hydraulic
The contact owns a 2003 Mercedes-Benz SL500. The contact stated while driving 40 MPH, the brake pedal was depressed however, the vehicle failed to respond as needed. The contact depressed the brake pedal firmly however, the vehicle failed to respond. The parking brake was activated however, the vehicle failed to respond as desig…
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The contact owns a 2003 Mercedes-Benz SL500. The contact stated while driving 40 MPH, the brake pedal was depressed however, the vehicle failed to respond as needed. The contact depressed the brake pedal firmly however, the vehicle failed to respond. The parking brake was activated however, the vehicle failed to respond as designed. The contact was however able to pull over and eventually the vehicle came to a complete stop. The vehicle was towed. The dealer and the manufacturer were contacted and stated that the VIN was not included in NHTSA Campaign Number: 05V133000 (Service Brakes, Hydraulic). The failure mileage was 126,000. The consumer stated the part put on the vehicle for the recall was a defective part and not installed correctly.
NHTSA ODI #11474801
Mileage unknown · Mar 15, 2022
Fuel/propulsion System
The 2003 SL500 with seemingly no instigating incident or event had the gas tank baffle come apart due to the poor and faulty design of this component. This baffle now is loose and floats on the gas in the gas tank, banging around when there is acceleration or deceleration, even turning sometimes causes it to bang around. Speed b…
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The 2003 SL500 with seemingly no instigating incident or event had the gas tank baffle come apart due to the poor and faulty design of this component. This baffle now is loose and floats on the gas in the gas tank, banging around when there is acceleration or deceleration, even turning sometimes causes it to bang around. Speed bumps are another source of loud banging from the baffle bumping into the sides of the tank. The issue with 2003 SL500's is ubiquitous, it is not a question of what percentage of them will experience as it appears it will happen to this vehicle at some point due to the poor design and implementation of the baffle. This wouldn't be such a big problem if this was a minor repair and was a reasonable price to have a shop perform or for the more mechanically inclined owner to perform themselves, but it is a ridiculously complex and time-consuming job just to get to the gas tank and take it off. My mechanic told me it is akin to taking the transmission or engine out and as such labor is outstandingly and outrageously expensive with this job requiring approximately $2000-$2500 to perform according to my mechanic and other SL500 owners who have also had to deal with this issue. This is an issue that you may not experience if you don't own one of these vehicles for long enough, but the vehicle will have this problem during it's lifetime and Mercedes should be responsible for allowing such a design to make it into production.
NHTSA ODI #11456885
52,500 miles · Dec 30, 2021
Suspension
The contact owns a 2003 Mercedes-Benz SL500. The contact stated that after parking the vehicle, the following day he noticed that the front of the vehicle was lowered down. The contact stated that the car was too low a warning light was illuminated. The contact stated while starting the vehicle and taking his foot off the brake …
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The contact owns a 2003 Mercedes-Benz SL500. The contact stated that after parking the vehicle, the following day he noticed that the front of the vehicle was lowered down. The contact stated that the car was too low a warning light was illuminated. The contact stated while starting the vehicle and taking his foot off the brake pedal, the vehicle would raise up independently and would be able to drive to his destination. The contact took the vehicle to the local dealer, where it was diagnosed with needing the front strap suspension to be replaced. The vehicle was repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 52,500.
NHTSA ODI #11445617
Mileage unknown · Aug 22, 2021
Power TrainSteeringSuspension
It has been nearly two years I have stopped driving my 2003 Mercedes SL500, although I only have about 80,000 miles on the car. This is due to ABC warning light(red display: please drive carefully)comes on intermittently and the car drives very bouncy and it feels the car has no shocks, definitely feeling it would be unsafe to d…
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It has been nearly two years I have stopped driving my 2003 Mercedes SL500, although I only have about 80,000 miles on the car. This is due to ABC warning light(red display: please drive carefully)comes on intermittently and the car drives very bouncy and it feels the car has no shocks, definitely feeling it would be unsafe to drive. The diagnostic message comes up saying "visit workshop". This is the third time this ABC pump issue is stopping me from driving the car, since it first appeared when I had 29,000 miles on the car which was under manufacturer warranty (50,000 miles or four years) and the dealership replaced the ABC pump and also replaced the engine mounts. The ABC red light appeared again when I had about 51,000 miles on the car. It happened also the engine mounts were in need of replacement again. As the Warranty was only for 50,000 miles, Mercedes refused to repair the ABC pump and the engine mounts under warranty and finally I agreed to a 50% cost to me to have repairs done. I expressed my opinion that the ABC pump and the engine mounts had engineering and manufacturing defect and they should have 50,000 miles warranty as the original warranty, from the time of replacement. Regrettably, same ABC malfunction and engine mounts became an issue at 78,000 miles and now the dealer and Mercedes refuse to replace the ABC pump and engine mounts under warranty and have given an estimate of $7336.36 for the necessary replacement of parts, including labor, but excluding taxes. To divert attention from ABC pump, the dealer is now referring to the problem as "power Steering pump"I have extensively researched the issues and it appears the mentioned problems with my car are prevailing issues with other Mercedes 2003 SL 500, and there are 100's of owners who feel Mercedes is not taking responsibility for replacement and repair of these defective parts under warranty. My car is unsafe to drive. There should be a recall by Mercedes to fix these dangerous to drive cars.
NHTSA ODI #11430048
95,000 miles · Apr 29, 2021
Steering
TL* THE CONTACT OWNS A 2003 MERCEDES BENZ SL500. THE CONTACT STATED WHILE DRIVING 45 MPH, THE ACTIVE BODY CONTROL (ABC) WARNING LIGHT ILLUMINATED AND THE STEERING WHEEL BECAME DIFFICULT TO TURN. THE CONTACT PARKED THE VEHICLE ON THE SIDE OF THE ROAD. THE VEHICLE WAS NOT DRIVABLE. THE VEHICLE WAS TOWED TO AN UNKNOWN MERCEDES-BENZ…
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TL* THE CONTACT OWNS A 2003 MERCEDES BENZ SL500. THE CONTACT STATED WHILE DRIVING 45 MPH, THE ACTIVE BODY CONTROL (ABC) WARNING LIGHT ILLUMINATED AND THE STEERING WHEEL BECAME DIFFICULT TO TURN. THE CONTACT PARKED THE VEHICLE ON THE SIDE OF THE ROAD. THE VEHICLE WAS NOT DRIVABLE. THE VEHICLE WAS TOWED TO AN UNKNOWN MERCEDES-BENZ DEALER TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE ACTIVE BODY CONTROL (ABC) NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED HOWEVER, THE FAILURE PERSISTED. THE MANUFACTURER WAS NOT INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 95,000. THE VIN WAS NOT AVAILABLE.
NHTSA ODI #11414395