2011 Mercedes-Benz S550 Electrical system Problems
- Complaints
- 1about this part
- Share
- 11%of 9 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the electrical system of the 2011 Mercedes-Benz S550, 11% of the 9 complaints for this model year.
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.
“The contact owns a 2011 Mercedes-Benz S550. While driving 70 MPH, the vehicle accelerated up to 110 MPH on its own. The rear of the vehicle rattled without warning. On another occasion, all the warning indicators failed to illuminate and the GPS provided incorrect information. The vehicle was taken to a dealer, but they could not duplicate the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was unknown.”
NHTSA complaint #10914797, filed 2016-10Related 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…
- 11020872Jul 16, 2025Complaint Commissioning not possible after replacement of TRANSMISSION 722.9 or of electrohydraulic controller unit (EHS) or of repair kit controller unit (VGS). Cause The wrong…
- 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…
- 11006658Aug 10, 2024Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) C-Class, E-Class, S-Class, G-Class, CL, CLS, ML, GL, GLE…
- 11008064Aug 9, 2024In our continuing efforts to ensure the proper performance and quality of your vehicle, we are writing to inform you that on certain Model Year 2011-2018 C-Class, E-Class…
- 10248173Dec 11, 2023Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (âÂÂMYâÂÂ) 2009-2012 GL-Class, ML-Class, R-Class, and…
- 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…
Electrical system: other model years
Other parts of the 2011 Mercedes-Benz S550
2 complaintsOther or unknown
2 complaintsEngine
1 complaintsExterior lighting
1 complaintsForward collision avoidance
1 complaintsBody and structure
1 complaintsSuspension
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2011 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