2007 Mercedes-Benz S550 Electrical system Problems
- Complaints
- 11about this part
- Share
- 20%of 54 total for the year
- Median mileage
- 64,122miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 11 complaints about the electrical system of the 2007 Mercedes-Benz S550, 20% of the 54 complaints for this model year. Where a mileage was given, the median is 64,122 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.
“Was driving and car just makes a jolt while shifting gear than I can't accelerate and it gets stuck in first gear RPM starts going up if I try to accelerate than I'll have to turn engine off which is inconvenient when your in traffic than restart it and it'll be normal but it happens every other day. Now the car is stuck on a gear and won't change gears completely parked it over night and still doesn't change gears when I start car and try to put it in drive it makes a hard jolt and doesn't accelerate past 30 MPH. Been happening for 2 years now...”
NHTSA complaint #10818757, filed 2016-01, 90,000 miles“The vehicle shuts off for a second the esp and ABS lights would come on, the steering wheel of the vehicle would get stiff, the brakes get stiff the headlights and interior lights would go off, and the command center would reboot. It seems like the vehicle is experiencing a brief electrical failure. I have been complaining of this problem since I purchased the vehicle as a certified preowned vehicle. The first time I took the vehicle to the dealership the replaced the steering control module and the problem persisted. …”
NHTSA complaint #10388348, filed 2011-03, 61,000 miles“The car stopped accelerating and then quit running. The conductor plate in the transmission failed. This is a known safety defect that Mercedes-Benz has ignored.”
NHTSA complaint #10556570, filed 2013-12, 64,122 miles“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.”
NHTSA complaint #11616129, filed 2024-09“I was driving my S550 and came to a red light. I stopped at the light and when it turned green, I took my foot off the brakes and pressed the accelerator, but there was to response to pressing the accelerator. The car rpms were increasing but the vehicle was crawling at less than 5mph. This LED to me pulling over and parking the vehicle and turning it off. I waited 5 minutes and then restarted it and it began to work normally. …”
NHTSA complaint #10618927, filed 2014-08Related service bulletins
- 11033185May 26, 2026Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service not activated" appears on the…
- 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…
- 10186141Dec 10, 2020NTG5.5: Incorrect time shown on instrument cluster, COMAND display, and analog clock
- 10135604Mar 31, 2015Vehicle cannot be opened via Keyless-Go and radio remote control
- 10165854Jul 12, 2014The trunk lid sometimes does not open completely and does not close (completely). This complaint is accompanied by the following symptoms: - Illumination of the trunk lid control…
- 10166098Jul 10, 2014Multicontour system fails during air release procedure. The system becomes operational again after an ignition change. Fault code 9E8900 is stored.
- 10165853Jul 3, 2014When on rough roads and with side loads applied to the center console (leg support) cracking noise may occur in the transition between the instrument panel and the center console.
- 10167006Feb 12, 2014Engine diagnosis warning lamp active. Fault code 20BE1B and/or 20BD1B (The heating element of the AdBlue tank has a malfunction) is logged in the Blue-Tec control unit.
- 10167572Jul 3, 2013If it is necessary to replace an HV battery, the return will only be accepted with the filled-out ?Analysis Sheet for Transportability of High-Voltage Batteries Form? accompanied…
Electrical system: other model years
Other parts of the 2007 Mercedes-Benz S550
13 complaintsSuspension
12 complaintsVehicle speed control
9 complaintsEngine
8 complaintsOther or unknown
6 complaintsFuel system
5 complaintsEngine cooling
4 complaintsAir bags
3 complaintsSteering
3 complaintsBody and structure
3 complaintsBrakes
2 complaintsEquipment
1 complaints
← All problems reported for the 2007 Mercedes-Benz S550
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