There are no safety recalls for the 2004 Mercedes-Benz SL500, but owners have filed 45 complaints with NHTSA.
2004 Mercedes-Benz SL500 problems reported by owners
| Problem area | Reports | |
|---|
| Suspension | 24 | |
| Service Brakes | 9 | |
| Fuel System, Gasoline | 5 | |
| Electrical System | 4 | |
| Fuel/Propulsion System | 4 | |
| Service Brakes, Hydraulic | 3 | |
| Power Train | 3 | |
| Wheels | 3 | |
| Vehicle Speed Control | 2 | |
| Unknown or Other | 2 | |
| Engine and Engine Cooling | 1 | |
| Steering | 1 | |
Most reported parts
- Suspension › Front — 2
- Power Train › Automatic Transmission — 1
- Suspension › Rear — 1
- Fuel System, Gasoline › Storage › Tank Assembly — 1
- Structure › Body — 1
Typical mileage at the time of the problem: 76,000 miles (median of owner reports).
Problems that are not covered by a recall are paid repairs; labor rates follow local mechanic pay — see what auto mechanics earn in each state.
Recent 2004 Mercedes-Benz SL500 complaints
Owner reports filed with NHTSA, as written (personal details removed). Complaints are not verified by NHTSA.
Service Brakes, Hydraulic · at 62,800 miles · reported Aug 5, 2026
The contact owns a 2004 Mercedes-Benz SL500. The contact stated that after starting the vehicle, the message "Brakes Reached Historic Threshold" was displayed, which indicated that the brake control unit had malfunctioned. Additionally, while depressing the brake pedal, the brake pedal was spongy, causing the stopping distance to become extended. The vehicle was taken to the local dealer and was diagnosed with brake control unit failure. The contact was informed that the brake control unit needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no…
Service Brakes · reported Jan 24, 2026
Question 1: The Sensotronic Brake Control (SBC) unit, which is a high-pressure "brake-by-wire" hydraulic system. Component A7/3. The component is currently installed in the vehicle and is available for inspection. Question 2: The vehicle experienced a sudden, catastrophic loss of hydraulic brake pressure while in operation. This failure required extreme physical force on the pedal and significant increase in stopping distance. The vehicle is currently in my garage with chocked wheels until I figure out what's next. A couple days ago, I had the car at a dealer and requested a review of this…
Electrical System · reported Apr 23, 2023
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 in front, convenience battery in trunk and fuses that operate at 130 Amps - the BCM capacitors and circuit board age and at some point can no longer handle the high current and catch fire.
Fuel/Propulsion System · reported May 7, 2022
On many 2003 and 2004 models. Broken fuel tank baffle inside fuel tank. This is well documented and could possibly cause explosion.
Fuel/Propulsion System · at 118,000 miles · reported Jul 30, 2020
On july 22, 2020 the vehicle (2004 mercedes-benz sl500 (R230)began making a loud banging noise in the rear when stopping and turning. I delivered the vehicle to a local shop where the vehicle was diagnosed as having a broken baffle in the fuel tank. The only solution is to replace the entire fuel tank. Many other owners of this model have experienced the same issue and is clearly a manufacturer defect; this cannot be caused by excess wear on the vehicle. Because there is now a large section of the fuel tank freely swinging inside, there is a chance that this could cause a spark and subsequent…
Frequently asked questions
Does the 2004 Mercedes-Benz SL500 have any recalls?
No. NHTSA has no safety recalls for the 2004 Mercedes-Benz SL500 as of this update. Check your VIN at nhtsa.gov/recalls for the latest status.
What is the most common problem with the 2004 Mercedes-Benz SL500?
Owners report suspension problems most often (24 reports), followed by service brakes (9). The typical mileage when problems were reported is about 76,000 miles.
Are Mercedes-Benz recall repairs free?
Yes. Safety recall repairs are free at authorized Mercedes-Benz dealers, whether you are the first owner or bought the car used.