2016 Mercedes-Benz GLC 300 Transmission and drivetrain Problems
- Complaints
- 6about this part
- Share
- 4%of 134 total for the year
- Median mileage
- 14,750miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the transmission and drivetrain of the 2016 Mercedes-Benz GLC 300, 4% of the 134 complaints for this model year. Where a mileage was given, the median is 14,750 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.
“I was unable to put the car in the drive after pulling out parking spaces or any other instance where the car needed to move. When attempting to put in drive, the car would revert to neutral and drift. Leaving me stuck in the middle of the road or parking lots. Check engine light came on briefly after the car wouldn't go in to drive but disappeared. Took it in to dealer immediately and they indicated that the transmission valve body control unit had failed and needed to be replaced. The car has less than 60k miles.”
NHTSA complaint #11466465, filed 2022-05“Piston 1 cracked while driving on the highway. My sibling was driving on the highway when the engine suddenly started misfiring and losing power because it lost compression on the piston that cracked. I was lucky enough that I have mechanic experience to replace all the damaged components myself and paid out of pocket. I was super fortunate that the cylinder walls did not get damaged when this happened thus not needing an entire engine replacement which would cost around $10,000 from mercedes. I had to go pick up a trailer from UHaul and go pick up the vehicle from where it broke down. …”
NHTSA complaint #11486871, filed 2022-09“The contact owns a 2016 Mercedes-Benz glc 300. The contact stated that the vehicle hesitated while the accelerator pedal was depressed. The failure occurred without warning on seven occasions. The vehicle was taken to the dealer, but the failure could not be replicated. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 500.”
NHTSA complaint #10917475, filed 2016-10, 500 miles“The contact owns a 2016 mercedes benz GLC300. The contact stated he placed the gear shifter in park while engine was running however vehicle rolled across the street and crashed into a stone wall. The contact opened the driver's side door however, vehicle failed to stop. There were no reported injuries or fire. The air bags did not deploy. A police report was filed. The vehicle was towed to an independent lot. The local dealer and manufacturer were not contacted. The failure mileage was 29,000.”
NHTSA complaint #11306665, filed 2020-02, 29,000 miles“The contact owns a 2016 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the check engine warning illuminated. The contact stated that the vehicle was taken to the Emissions Center, and the vehicle failed the Emissions test. The vehicle was taken to the dealer to be diagnosed. The dealer retrieved DTC: P052E (PCM has detected an inappropriate degree of pressure from the crankcase pressure sensor). The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was unknown.”
NHTSA complaint #11635618, filed 2025-01Related service bulletins
- 11038187Sep 26, 2026Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic /9G‑TRONIC automatic transmission) and 725.1 (NAG3 facelift/9G‑TRONIC automatic transmission…
- 11037987Sep 14, 2026Complaint Only vehicles with a variable transfer case are affected. This can be identified through control unit N45 or N15/7 in the quick test. When accelerating with light load…
- 11037616Sep 4, 2026Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic / 9G‑TRONIC automatic transmission) and 725.1 (NAG3 facelift/9G‑TRONIC automatic transmission…
- 11036077Aug 5, 2026Complaint This document is intended as a pre-case diagnostic reference for transmission related concerns. It will also ensure that if a case is necessary, all supporting…
- 11035780Aug 4, 2026Complaint Mercedes-Benz USA is currently experiencing limited availability of transmission fluid specification ATF 236.17 due to a global supply constraint. 236.17 ATF 1L and 5L…
- 11035005Jul 14, 2026Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of…
- 11033050May 22, 2026Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline…
- 11032736May 15, 2026The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no…
- 11028834Feb 13, 2026Complaint Check engine light on with the following fault is current in the VGS Control Unit: P084300 Oil pressure sensor 'A' has a short circuit to positive stored in VGS control…
- 11028270Feb 3, 2026Complaint Only vehicles with a variable transfer case are affected. This can be identified through control unit N45 or N15/7 in the quick test. When accelerating with light load…
Transmission and drivetrain: other model years
Other parts of the 2016 Mercedes-Benz GLC 300
38 complaintsBrakes
27 complaintsFuel system
21 complaintsOther or unknown
21 complaintsAir bags
12 complaintsElectrical system
11 complaintsSteering
7 complaintsSeat belts
5 complaintsVisibility (wipers, defrost, mirrors)
5 complaintsEngine cooling
4 complaintsBody and structure
4 complaintsWheels
4 complaints
← All problems reported for the 2016 Mercedes-Benz GLC 300
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 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