2007 Mercedes-Benz SL550 Electrical system Problems
- Complaints
- 3about this part
- Share
- 19%of 16 total for the year
- Median mileage
- 19,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the electrical system of the 2007 Mercedes-Benz SL550, 19% of the 16 complaints for this model year. Where a mileage was given, the median is 19,000 miles. 2 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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 the BCM (Battery Control Module) I was told there was nothing they can do because Mercedes discontinued the replacement parts. So I started to investigate the BCM issue in this model and come to find out when they go bad the vehicles will get on fire, many owners around the world have posted the burned BCM & cars as well. …”
NHTSA complaint #11693184, filed 2025-10“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 thick soot. The smoked seeped into everything including the closed console compartment and glove compartment. I believe the fire itself did not spread because of a lack of oxygen as the car was parked with top folding metal top up and the windows closed. The fire occurred on feb. 16, 2018, and was not discovered until the following day. …”
NHTSA complaint #11082147, filed 2018-03Related service bulletins
- 11015640Mar 5, 2025Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party…
- 11008091Sep 28, 2024Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party…
- 11000705May 31, 2024Battery Control Module needs replacement due to electrical overstress. Incorrect charging procedures and battery maintenance. Remedy Proper care and maintenance of the electrical…
- 10166105Jul 10, 2014The electrical wiring harness is trapped between the height adjustment gearing and the cushion frame.
- 10048279Nov 1, 2012Mercedes: camshaft adjustment solenoid may leak oil due to settling properties of seal and the engine wiring harness will be retrofitted with four adapter harnesses as a…
- 10033070Dec 16, 2009Xentry (mercedes): engine warning lamp is currently on or was on and a delay fault of the camshaft adjust to current or stored in the engine control unit. Models 171, 203, 209…
- 10016687Mar 31, 2009Abc visit workshop displayed in instrument cluster and hydraulic fluid leakage. *tt updated 5/14/09. Models 215, 220 and 230. Model years unknown.
- 10022555Jun 1, 2007Check starter wiring harness routing and re-route if necessary (m273 engine).
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2009 | 3 | 20% |
| 2007 | 3 | 19% |
Other parts of the 2007 Mercedes-Benz SL550
8 complaintsSuspension
2 complaintsTransmission and drivetrain
2 complaintsAir bags
1 complaintsEngine
1 complaintsSteering
1 complaintsBody and structure
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 2007 Mercedes-Benz SL550
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology