There are 5 owner-reported powertrain & transmission complaints for the 2019 Mercedes-Benz GLC-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
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. The dealer confirmed that the VIN was not under recall and that the issue was not covered under warranty. The vehicle was not repaired. The contact informed the manufacturer of the failure, and a case was opened. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 60,000.
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. The entire experience was terrifying, especially given that the car gave no prior indication of a malfunction. The vehicle had to be towed to Mercedes. I have no real answers from Mercedes as to the cause or why the vehicle did not notify me or why the service light did not go on. The vehicle only had 51,000 miles and is well taken care of. Because the car was out of warranty they refused to cover the expense. I called and sent letters to corporate and received $2500 towards a $6000 bill. I feel this was a safety issue and my car shut down without any type of warning and Mercedes should cover all repair costs. The car has been repaired, but I am still nervous to drive it.
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.
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.
TL THE CONTACT OWNS A 2019 MERCEDES-BENZ GLC350E4. WHILE DRIVING AND DEPRESSING THE BRAKE PEDAL, THE VEHICLE JERKED FORWARD BEFORE IT STOPPED. THERE WAS NO WARNING INDICATOR ILLUMINATED. THE FAILURE RECURRED SEVERAL TIMES. THE VEHICLE ALSO OVERHEATED, WHICH CAUSED THE COOLING SYSTEM NOT TO WORK. THE VEHICLE WAS TAKEN TO FLETCHER JONES MOTORCARS (949-718-3000, LOCATED AT 3300 JAMBOREE RD, NEWPORT BEACH, CA 92660), BUT THE FAILURE COULD NOT BE DUPLICATED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND STATED THAT THERE WAS NO FAILURE WITH THE VEHICLE. ON ONE OCCASION, WHILE DRIVING APPROXIMATELY 30 MPH, THE OVERHEAT WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS PULLED TO THE SIDE AND WAS LATER DRIVEN TO THE CONTACT'S RESIDENCE. THE CONTACT CALLED THE SAME DEALER AND WAS INFORMED TO CALL THE MANUFACTURER. THE MANUFACTURER SENT A TOW TRUCK AND THE VEHICLE WAS TOWED TO THE SAME DEALER WHERE IT WAS DIAGNOSED THAT THE THERMOSTAT WAS BLOCKED. THE THERMOSTAT WAS REPLACED, BUT THE CONTACT STATED THAT THE OVERHEATING DID NOT COMPLETELY STOP. THE FAILURE MILEAGE WAS UNKNOWN. *JS
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