2021 Mercedes-Benz GLC 300: engine stalls while driving

Filed Nov 4, 2026 · Transmission · 75,000 miles · CA

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated that while driving 5 MPH, the vehicle stalled and lost motive power, with the check engine warning light illuminated. The vehicle was able to be restarted. The vehicle was taken to a service center, and the contact was provided DTC: P07B7. The contact was informed that the failure was associated with an internal transmission or software programming failure. The contact was informed that the transmission needed to be replaced and was referred to the dealer for additional assistance. The vehicle was scheduled for an appointment with the dealer. The failure mileage was approximately 75,000.

Filed Sep 22, 2025 · Engine · VA

Check engine light came on. Code was P219D mixture formation is irregular on cylinder 2. Informed today, the cylinder will need to be replaced entirely for about $10,000. Concerned that although this did not happen to me, others have stated the vehicle completely stalls while driving.

Filed Mar 3, 2025 · Engine, Fuel system · NC

High beam can't auto dim Fuel pump fail to operate, misfires, and shut down while driving

Filed Jan 22, 2024 · Fuel system · 19,369 miles · CA

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated that while his wife was driving in the rain approximately 35 MPH, the vehicle lost motive power and stalled. The vehicle was able to be restarted. The vehicle was taken to a dealer to be diagnosed. The contact was informed that the cylinder head needed to be replaced. The vehicle was repaired but the failure reoccurred. The contact believed that the failure was associated with the federal safety agency Campaign Number: 23V445000 (Fuel System, Gasoline) however, the VIN was not included. The manufacturer was notified of the failure. The failure mileage was 19,369.

Filed Jan 12, 2024 · Engine · SC

On 12/17/2023 at approximately 6:00 am while traveling to a friends house, my car stalled out on me. The engine light came on and the car started hesitating ( sputtering) and then shut off. I tried to start the car and it did with the engine light still on. I called a tow truck and had it towed to Carlton Mercedes. On 12/18/2023 the service advisor contacted me via text to say they will do a diagnostic to find the problem and will be in touch. 5 days later, i was told that the sensors were wet due to standing rain water I encountered and that nothing else was wrong. I picked up the car later that evening. 3weeks later the same exact thing happened. The car started sputtering (hesitating) the engine light came on and it shut off. Although my VIN number was not apart of a recent recall for my make and model, I would like the Safety Department to investigate the issue and have my car added to the recall list. The recall address the issue of loss of power to vehicles of the same make and model as mine. The Mercedes Manufacture will not fix my car under the recall if it hasn't been added to the list. I don't believe the consumer should have to pay simply because the VIN was added to the list even thought the problem exist. Please Help!

Filed Mar 29, 2021 · Engine · 199 miles · FL

2021 mercedes glc. Consumer writes in regards to valve spring failure and stalled engine. *ld the consumer stated shortly after purchasing the vehicle, the valve spring broke causing the engine to fail while driving. The failure mileage was 199. The consumer stated the roadside assistance grossly under estimated it's arrival time. Also, the consumer was in an unfamiliar area but, roadside assistance required an address before sending the tow truck. The consumer had to walk the street to find an address on a home. The consumer felt the dealership attempted to downplay the failure as a simple fix. The manufacturer was notified and offered goodwill assistance which the consumer accepted. *js