2012 Mercedes-Benz E350 electrical system problems
18 owner complaints filed with NHTSA name the electrical system on the 2012 Mercedes-Benz E350 — 8% of all complaints for this model year.
What owners report
“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
“Camshaft sensors and solenoid leak oil internally which then gets into the sensors electrical connector. From the the oil enters the engine wire harness through capillary action maki g it’s way to other sensors and ultimately the DME (Digital Motor Electronics). This can cause February DME to fail…”
filed Sep 30, 2022
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 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.