2012 Mercedes-Benz ML350 electrical system problems
11 owner complaints filed with NHTSA name the electrical system on the 2012 Mercedes-Benz ML350 — 17% of all complaints for this model year.
What owners report
“My name is [XXX] My vehicle cut off on me 3 times twice while stationary and once at an intersection. Found oil in engine control module due to failed cam position sensors. Oil has traveled through the engine harness to ECM causing oil to get into module and cause it to shut down but it did start…”
filed Jan 23, 2025
“Turn signals will not operate, dealership quoted me $1400 3 years ago, had the work performed and now the issue is happening again and I am being quoted the same amount of money. This is a safety concern if I cannot signal to others where I am turning!!!!! This could cause an accident!!!!! This is…”
filed Jul 22, 2024
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 ML350 years
| Year | Reports | Share |
|---|---|---|
| 2015 ML350 | 4 | 8% |
| 2014 ML350 | 20 | 30% |
| 2013 ML350 | 11 | 20% |
| 2011 ML350 | 16 | 15% |
| 2010 ML350 | 10 | 10% |
| 2009 ML350 | 17 | 18% |
| 2008 ML350 | 13 | 19% |
| 2007 ML350 | 19 | 23% |
| 2006 ML350 | 29 | 17% |
| 2004 ML350 | 4 | 11% |
| 2003 ML350 | 4 | 16% |
Other reported problem areas on the 2012 Mercedes-Benz ML350
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.