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Transmission and drivetrainPart report

2018 Mercedes-Benz GLC 300 Transmission and drivetrain Problems

Complaints
8about this part
Share
9%of 87 total for the year
Median mileage
6,600miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 8 complaints about the transmission and drivetrain of the 2018 Mercedes-Benz GLC 300, 9% of the 87 complaints for this model year. Where a mileage was given, the median is 6,600 miles. 1 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

“Electronic shiftier issue. Car will not do what is being input to the shiftier. Particular issue when going from park to drive, drive to reverse, or park to driver or reverse. (note that the pressure on brake pedal has always seemed excessive to me. Have had issue where car goes into neutral when trying to place the shiftier into park. I have had times where clearly the vehicle doesn't register that the brake is actuated when it is. Have had instance where vehicle starts off in drive and rolls under power as it didn't shift into park as instructed. …”

NHTSA complaint #11219924, filed 2019-06, 10,000 miles

“While slowly accelerating the transmission made a loud bang and the car slowed to a crawl in the middle of an intersection nearly causing a major accident, steering was nearly gone as well with no response from accelerator. The vehicle display also said it lost communication with the key which was in the vehicle.”

NHTSA complaint #11075967, filed 2018-03, 500 miles

“Component Failure: The vehicle is equipped with the M274 2.0L turbocharged engine, which suffered a major internal mechanical defect. An authorized Mercedes-Benz dealership diagnosed the vehicle at 79,504 miles with a malfunction in the crankcase ventilation system alongside severe internal defects, quoting a total repair estimate of $9,851 to perform extensive engine work. …”

NHTSA complaint #11741952, filed 2026-06

“The contact owns a 2018 Mercedes-Benz GLC300. The contact stated that while driving at various speeds, the vehicle shifted into gear initially without warning. The contact stated that while stopped at a light, the vehicle shut off with the Transmission Malfunction Stop message displayed on the instrument panel. The contact was unable to move the vehicle, and the vehicle was towed to an independent mechanic. …”

NHTSA complaint #11702561, filed 2025-12, 90,000 miles

Related service bulletins

Transmission and drivetrain: other model years

YearComplaintsShare of year
2024524%
202335%
202247%
202146%
202046%
2019511%
201889%
201777%
201665%

Other parts of the 2018 Mercedes-Benz GLC 300

Engine
28 complaintsOther or unknown
20 complaintsElectrical system
13 complaintsBody and structure
9 complaintsSeat belts
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 27, 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