There are 1 owner-reported fuel system complaints for the 2020 Mercedes-Benz GLC-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Driving slowly through a parking lot and had to stop for pedestrians. When the path was clear, the car would not accelerate. It only idled forward and slowly reached about 5 mph. Stepping on the accelerator pedal gave no response after repeatedly trying to accelerate. No warning lights came on to alert me of a problem. I was able to pull into a parking spot and after shutting off the ignition and turning back on, the throttle responded as normal. This was a very scary situation but at least it happened in a parking lot.
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