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Electrical systemPart report

2017 Mercedes-Benz GLC 300 Electrical system Problems

Complaints
15about this part
Share
15%of 101 total for the year
Median mileage
9,000miles
Trend
RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.

NHTSA recorded 15 complaints about the electrical system of the 2017 Mercedes-Benz GLC 300, 15% of the 101 complaints for this model year. Where a mileage was given, the median is 9,000 miles. 1 a fire, according to the filers. 1 recall campaign on record is filed under a similar system.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Vehicle key-less entry locked out the driver and passenger with keys inside the vehicle while parked. Talked to other mercedes GLC300 owners and they are experiencing same issue. This happened late at night with my wife and 7 year old daughter in a high crime area while I was out of town. Mercedes roadside assistance charged us $99.95 to unlock vehicle. This is a life threatening defect and should be acknowledged and addressed by mercedes immediately.”

NHTSA complaint #11034325, filed 2017-10, 9,000 miles

“The engine suddenly went up in flames while driving,my wife switched off the ignition and go out of the car. There was a big hole and mercedes authorized dealer siad this is a catastrophic event. This car is new purchased on october 31st 2016 mb says they will replace the engine as it is in warranty, but sentimentally we are so upset , if the fire would have caught on to gas tank. Please suggest. Vehicle was in motion and she was driving at less than 30 miles per hour when she noticed burning smell and immeditely fumes were coming from the AC vents. Please suggest our options in this case”

NHTSA complaint #10981207, filed 2017-04, 3,000 miles

“I pressed the Park button, but the transmission did not go into park. When I let my foot off the break, thinking that I was in Park, the car started rolling backwards. Thank God my wife was in the car and noticed the motion and shouted to me to break the car. I was able to stop the car before hitting anybody or anything, but it was dangerously scary.”

NHTSA complaint #11471238, filed 2022-06

“After noticing my engine light come on, I had my vehicle checked out, the dealer informed (after spending $250.00) that the problem is the crankcase ventilation and it's a common problem. It seems the oh so familiar crankcase ventilation system is not working. This is a common problem with the GLC300 and Mercedes Benz needs to correct it. The engine is not being ventilated properly and the overwhelming smell of gasoline engulfs the interior of the vehicle. This is putting mine and the life of my family at risk, due to a faulty manufacturer issue. …”

NHTSA complaint #11563324, filed 2024-01

“Odometer reading more miles then driven (may have been tampered with altered) There is an electrical issue The computer required to be reprogrammed has not been done yet While driving the vehicle completely stop accelerating in the middle of traffic on the interstate placed my life in danger especially because traffic was moving rapidly the vehicle was jerking horribly also several codes came on when the service light came on also needed a pcp vale hose system they never repaired it i asked to have it repaired they agreed and then stated the vehicle had to many issues was sending to auction…”

NHTSA complaint #11520184, filed 2023-05

Related recalls

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 2017 Mercedes-Benz GLC 300

Engine
37 complaintsFuel system
16 complaintsOther or unknown
13 complaintsAir bags
11 complaintsSeat belts
8 complaintsVisibility (wipers, defrost, mirrors)
8 complaintsTransmission and drivetrain
7 complaintsBrakes
4 complaintsForward collision avoidance
4 complaintsSteering
4 complaintsTires
3 complaintsSeats
2 complaints

← All problems reported for the 2017 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