There are 3 owner-reported fuel system complaints for the 2020 Mercedes-Benz GLB-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The contact owns a 2020 Mercedes-Benz GLB250. The contact stated that there was an abnormal fuel odor inside the cabin of the vehicle. There were no warning lights illuminated. The vehicle was taken to the local dealer on three occasions however, the dealer was unable to determine the cause of the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact that there were no recalls on the VIN. The contact was referred to the NHTSA Hotline for assistance. The failure mileage was approximately 45,000.
The contact owns a 2020 Mercedes-Benz GLB250. The contact stated while driving at approximately 30 MPH the vehicle had started shaking as if the engine was going to stall. The contact stated the check engine light was illuminated. The contact pulled over and stopped the vehicle, when she restarted the vehicle it had stopped shaking. The contact stated that the vehicle failure had been intermittent but had become a recurring failure and the vehicle had stalled several times. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that the fuel injectors and a gas cap needed to be replaced. The vehicle had not been repaired. The manufacturer had been informed of the failure. The contact had researched online and related failure NHTSA Campaign Number: 21V961000 (Fuel System, Gasoline). The failure mileage was approximately 54,000.
TL* THE CONTACT OWNS A 2020 MERCEDES-BENZ GLB250. THE CONTACT STATED THAT THERE WAS AN ABNORMALLY STRONG SMELL OF GASOLINE INSIDE OF THE VEHICLE. WHILE THE CONTACT'S SON WAS ABOUT TO ENTER THE VEHICLE, HE BECAME AWARE OF A LARGE AMOUNT OF GASOLINE LEAKING FROM THE VEHICLE. THE CONTACT HAD THE VEHICLE TOWED TO MERCEDES-BENZ OF LOS ANGELES (1801 S FIGUEROA ST, LOS ANGELES, CA 90015) WHERE THE VEHICLE WAS AWAITING REPAIRS FOR THE FUEL LEAK. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 11,820. *BF
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