2012 Mercedes-Benz E350 electrical system problems
19 owner complaints filed with NHTSA name the electrical system on the 2012 Mercedes-Benz E350 — 9% of all complaints for this model year.
What owners report
“The vehicle was parked when the steering wheel locked , and the headrest. The electrical for my headlight driver side low beam gave me a warning lamp message.”
filed Sep 16, 2026
“The contact owns a 2012 Mercedes- Benz E350. The contact stated while operating the vehicle the odor of fuel was present coming from the vehicle. Upon inspection it was discovered that the fuel had leaked from the vehicle. The vehicle was taken to the local dealer who diagnosed that the fuel pump…”
filed May 15, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Various control units on these vehicles may have been updated with incorrect software…Campaign 17V177000 · Mar 14, 2017
Related service bulletins
Complaint A popup is seen on the HU with the message "data connection temporarily not available". Potentially affected functionalities in NTG4.5, NTG5 1.Weather 2.Local Search 3.IP Radio 4.Send2Car 5.Speech Detection…
LI82.85-P-079087 · Service Bulletin/Repair Instructions · issued Aug 6, 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 instrument cluster. In addition, the following two…
LI82.85-P-080507 · Service Bulletin/Repair Instructions · issued May 26, 2026
Electrical System problems in other E350 years
| Year | Reports | Share |
|---|---|---|
| 2016 E350 | 9 | 18% |
| 2015 E350 | 5 | 16% |
| 2014 E350 | 38 | 14% |
| 2013 E350 | 12 | 7% |
| 2011 E350 | 4 | 2% |
| 2010 E350 | 17 | 9% |
| 2009 E350 | 3 | 5% |
| 2008 E350 | 18 | 10% |
| 2007 E350 | 17 | 5% |
| 2006 E350 | 18 | 5% |
Other reported problem areas on the 2012 Mercedes-Benz E350
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.