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Transmission and drivetrainPart report

2023 Mercedes-Benz GLC 300 Transmission and drivetrain Problems

Complaints
3about this part
Share
5%of 55 total for the year
Median mileage
—not reported
Trend
Too newThis model year is less than 4 years old, so a trend is not meaningful yet.

NHTSA recorded 3 complaints about the transmission and drivetrain of the 2023 Mercedes-Benz GLC 300, 5% of the 55 complaints for this model year.

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 2023 GLC300 would not start. The internal alarms kept going off, the push-start/stop would not respond. The vehicle was acting like it was being stolen, this lasted for 75 to 80 minutes. The display said 12V On-Board Electrical System Service Required and Blind Spot Assist Inoperative - over and over again. Couldn't get the key to make car lock or unlock. The car would not turn on, it would not turn off. The alarm message was persistent. Had to call a tow-truck to take it in for service. After 3+ hours the car restarted. …”

NHTSA complaint #11535976, filed 2023-08

“Vehicle shut down while driving. Warning lights illuminate, check engine light, do not shift into gear warning, 48v battery warning, etc. Would not stop alarming. Could not shut off car. Could not put car into park. Could not start car. Warning buzzer would go off entire time. Car was only able to be started when remote start request was initiated when car was in this mode, car was started but then shut off 10 seconds laters app states, “check engine light on” wil shut off the car. Car back to normal after event approx 60 min but check engine light remains on.”

NHTSA complaint #11537315, filed 2023-08

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 2023 Mercedes-Benz GLC 300

Electrical system
30 complaintsEngine
15 complaintsExterior lighting
10 complaintsOther or unknown
9 complaintsForward collision avoidance
7 complaintsLane departure
6 complaintsBrakes
5 complaintsFuel system
5 complaintsBody and structure
4 complaintsSteering
2 complaintsVehicle speed control
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints

← All problems reported for the 2023 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