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Electrical systemPart report

2012 Mercedes-Benz ML350 Electrical system Problems

Complaints
11about this part
Share
17%of 65 total for the year
Median mileage
63,450miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 11 complaints about the electrical system of the 2012 Mercedes-Benz ML350, 17% of the 65 complaints for this model year. Where a mileage was given, the median is 63,450 miles. 1 of these say a crash was involved, according to the filers. 1 recall campaign on record is filed under a similar system.

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.

“Hello, ref: ML350 camshaft solenoid leak! I am seeking out for your help wrt to a situation with 2012 ML350. Enclosed herewith is an inspection report from a recent service visit requiring close of $8k in repairs for your reference. Engine harness (oil lled harness and various components have oil in them, all components with oil should be replaced, quick insp found a few components but there may be more that need to be replaced) after reviewing the inspection report, I did some research and came across campaign no. …”

NHTSA complaint #11414943, filed 2021-05, 92,000 miles

“On occasion the blind spot assist becomes inoperative. Frequently when this occurs, it also deactivates the turn signals creating, in my opinion, a very dangerous situation. Each time it's happened in motion on an expressway. I've contacted the local mercedes benz dealer who tells me the only way to correct this problem is to pull over to the side of the road, turn off the car and turn it back on to reactivate the system. Not only is this inconvenient, it doesn't always correct the problem. I can live without the blind spot assist; however, not with inoperative turn signals. …”

NHTSA complaint #11064734, filed 2018-01, 76,900 miles

“On random occasions, while in motion at any speed, the message blind spot assist is inoperative and indicator lights stop working. The only way to clear it is to stop the vehicle, turn off the ignition and start the vehicle back up.”

NHTSA complaint #11182004, filed 2019-02, 50,000 miles

“The turn signals stop working after driving the car for a few minutes. To get them to work again requires stopping the car, shutting off the engine and restarting it which in turn resets the computer. This effort does not permanently fix the issue and they usually quit working again within two to ten miles. This is the fifth complaint to the NHTSA with this issue and this particular model. This is a safety hazard which needs to be addressed by the manufacturer and fixed free of charge. This has been an ongoing issue for the past two to three years with this car. …”

NHTSA complaint #11402827, filed 2021-03, 83,000 miles

“The steering column does not operate properly. The column no longer adjusts positions and more importantly, the turn signals work ad-hoc. When you start the vehicle, the turn signals tend to operate properly; however, after driving for approximately 15 minutes, the turn signals operate sporadically. THIS IS A SAFETY CONCERN as it's impossible to know when the turn signal will operate correctly or not, thus creating a hazard to me and others on the road. …”

NHTSA complaint #11511019, filed 2023-03

Related recalls

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
201548%
20142029%
20131119%
20121117%
20111614%
20101010%
20091718%
20081319%
20071923%
20062917%
2004411%
2003416%

Other parts of the 2012 Mercedes-Benz ML350

Engine
21 complaintsFuel system
16 complaintsExterior lighting
9 complaintsSteering
7 complaintsTransmission and drivetrain
6 complaintsLane departure
4 complaintsBrakes
3 complaintsSeat belts
3 complaintsBody and structure
3 complaintsAir bags
2 complaintsEngine cooling
2 complaintsOther or unknown
2 complaints

← All problems reported for the 2012 Mercedes-Benz ML350

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