There are 6 owner-reported powertrain & transmission complaints for the 2016 Mercedes-Benz GLC-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
P052e positive crankcase ventilation regularly valve
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.
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. Thinking about this from the perspective of a person who does not have access to rent a trailer, a vehicle to pull said trailer with, or the mechanic experience to fix the vehicle themselves, the cost to get this issue resolved would be much much more than it cost me.
TL* 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.
TL* THE CONTACT OWNS A 2016 MERCEDES-BENZ GLC 300. THE CONTACT FOUND NHTSA CAMPAIGN NUMBER: 17V114000 (ENGINE, TRANSMISSION) PERTAINING TO HER VEHICLE. THE PART TO DO THE REPAIR WAS UNAVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE MANUFACTURER WAS MADE AWARE OF THE ISSUE. THE CONTACT HAD NOT EXPERIENCED A FAILURE.
TL* 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.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026