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Transmission and drivetrainPart report

2019 Mercedes-Benz GLC 300 Transmission and drivetrain Problems

Complaints
5about this part
Share
11%of 47 total for the year
Median mileage
61,750miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 5 complaints about the transmission and drivetrain of the 2019 Mercedes-Benz GLC 300, 11% of the 47 complaints for this model year. Where a mileage was given, the median is 61,750 miles.

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.

“I was going through drive thru waiting in line, when suddenly the car started to accelerate sharply, I put two feet on the brakes to stop the forward motion of vehicle - could not stop or place in park or neutral. their was ample room from the vehicle in front.. slightly removed feet from brake, suv lunged at vehicle in front kept on lunging then came to a halt...vehicle went back to normal operation.”

NHTSA complaint #11443463, filed 2021-12

“The component that failed was the right front differential. My safety and the safety of others was put at high risk as I was driving at 60 mph on the highway and my vehicle suddenly and abruptly reduced speed to about 15mph without any warning. This created an extremely dangerous and potentially hazardous situation as I tried to maneuver my car at this very low speed on the highway in the middle lane safely to the side of the highway. Cars around me quickly maneuvered around me in attempts to avoid my slow moving vehicle and not hit me. …”

NHTSA complaint #11641513, filed 2025-02

“On April 16, 2026, within minutes of being released from a certified dealership, my 2019 Mercedes-Benz GLC 300 suffered a sudden and total loss of propulsion while traveling at high speed on the Belt Parkway (NY). Despite depressing the accelerator, the vehicle failed to maintain speed and stalled in active traffic. This created an immediate life-safety hazard, forcing me to navigate across multiple lanes without engine power to avoid a high-speed rear-end collision. The vehicle was released to me by Mercedes-Benz of Brooklyn on April 16, 2026, following a repair for which I paid $2,134.94. …”

NHTSA complaint #11736351, filed 2026-05

“The contact owns a 2019 Mercedes-Benz GLC300. The contact stated that while shifting from reverse to drive, the vehicle stalled and remained in neutral. After the vehicle stalled, the vehicle took approximately 8 minutes before the vehicle could be shifted into drive. Once in drive, the vehicle would jerk and shift to D3 before accelerating. The check engine warning light would illuminate while in reverse. The vehicle was taken to the dealer, who diagnosed a transmission failure due to a malfunctioning valve body and low pump pressure. …”

NHTSA complaint #11700738, filed 2025-11, 60,000 miles

“The contact owns a 2019 Mercedes-Benz GLC300. The contact stated that while stopped at a stoplight on a hill, the vehicle rolled backwards. The contact stated that the brake pedal was depressed to stop the vehicle from rolling backwards, preventing the vehicle from hitting the vehicle behind. The contact stated that the failure had occurred several times. The vehicle was taken to the dealer; however, the failure was not duplicated. The contact was informed that rolling backwards was normal. The manufacturer was not made aware of the failure. The failure mileage was approximately 63,500.”

NHTSA complaint #11680717, filed 2025-08, 63,500 miles

Related service bulletins

Transmission and drivetrain: other model years

YearComplaintsShare of year
2024524%
202335%
202247%
202146%
202046%
2019511%
201889%
201777%
201664%

Other parts of the 2019 Mercedes-Benz GLC 300

Other or unknown
15 complaintsElectrical system
14 complaintsEngine
11 complaintsBody and structure
5 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsFuel system
3 complaintsAir bags
2 complaintsVehicle speed control
2 complaintsBrakes
1 complaintsSeat belts
1 complaintsTires
1 complaintsWheels
1 complaints

← All problems reported for the 2019 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