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Electrical systemPart report

2018 Mercedes-Benz GLC 300 Electrical system Problems

Complaints
13about this part
Share
15%of 87 total for the year
Median mileage
6,062miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 13 complaints about the electrical system of the 2018 Mercedes-Benz GLC 300, 15% of the 87 complaints for this model year. Where a mileage was given, the median is 6,062 miles. 2 of these say a crash was involved, according to the filers.

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.

“The steering column stalk controls drive, reverse, neutral and parking. I stopped the vehicle on an incline in a parking lot. I had my foot on the brake. I shifted into neutral. The engine was still running. I thought I pushed the park button but the car rolled back into another vehicle.”

NHTSA complaint #11144554, filed 2018-10, 3,200 miles

“When I was pulling into a parking spot at a low speed, the car accelerated and lurched forward, hitting a wall, which deployed the airbags. When the car started to accelerate, I hit the brakes but they did not engage.”

NHTSA complaint #11349114, filed 2020-08, 21,000 miles

“'the first incident - occurred in august when I stopped at a stop-light. I started driving when the light turned green and the car was accelerating as normal. There were cars behind me accelerating as well as normal. My SUV automatically shifted from drive to neutral by itself as I continue to accelerate to move with the normal flow of traffic. The vehicle automatically slowed down to neutral '2nd incident - the same issue occurred again within two weeks I was driving on the long island expressway at approximately 40 miles per hour in heavy traffic which had commercial trucks. …”

NHTSA complaint #11140717, filed 2018-10, 6,000 miles

“All of the buttons on my steering wheel including the horn stopped working. I hear a clicking noise when i turn the steering wheel and the passenger air bag light randomly goes on and off. This leads me to believe the clock spring is broken. If the clock spring is the problem, this could create an airbag malfunction causing it to not deploy when needed or randomly deploy while i’m driving.”

NHTSA complaint #11535378, filed 2023-07

“While driving my SUV, I turned a corner and I heard and felt a wire or wires pull and snap inside the steering wheel. I then found that I could not operate any of the controls on the steering wheel and the driver side airbag light came on with a disabled message on the display. I think that it is the clock spring inside of the steering wheel that got caught up and snapped from me turning the wheel.”

NHTSA complaint #11475794, filed 2022-07

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
20251275%
2024629%
20233055%
20221220%
2021812%
202069%
20191430%
20181315%
20171515%
2016118%

Other parts of the 2018 Mercedes-Benz GLC 300

Engine
28 complaintsOther or unknown
20 complaintsBody and structure
9 complaintsSeat belts
8 complaintsTransmission and drivetrain
8 complaintsFuel system
7 complaintsAir bags
6 complaintsBrakes
5 complaintsForward collision avoidance
3 complaintsSteering
3 complaintsVehicle speed control
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaints

← All problems reported for the 2018 Mercedes-Benz GLC 300

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