2014 Mercedes-Benz ML350 electrical system problems
20 owner complaints filed with NHTSA name the electrical system on the 2014 Mercedes-Benz ML350 — 30% of all complaints for this model year.
What owners report
“Vehicle: 2014 Mercedes-Benz ML350 VIN: [XXX] I have experienced repeated failures of the Blind Spot Assist / driver-assist system since purchasing this vehicle. When I first purchased the ML350 in Texas, the vehicle already showed warning messages (“Blind Spot Assist Inoperative / Pre-Safe Function…”
filed Sep 19, 2025
“I purchased a used Mercedes-Benz from Freehold Mitsubishi in early 2024. Within hours, serious safety issues appeared, including a check engine light, cylinder misfire, EVAP leak, traction control failure, and blind spot assist malfunction. The vehicle’s ECM and wiring harness were later found…”
filed Jun 30, 2025
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% |
| 2013 ML350 | 11 | 20% |
| 2012 ML350 | 11 | 17% |
| 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 2014 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.