Home · 2020 Mercedes-benz GLB · Complaints

What 56 owners told NHTSA about the 2020 Mercedes-benz GLB

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (56)Crash / fire / injury (4)Body & structure (14)Electrical system (9)Engine (8)Airbags (7)Fuel system (7)Suspension (6)Speed control (3)Steering (3)Backup camera & sensors (2)Brakes (2)

3 of 56 complaints match · Speed control · clear filters

Dec 18, 2024Transmission & drivetrainSpeed control

The contact owns a 2020 Mercedes-Benz GLB250. The contact stated while the vehicle was at a stop light, the accelerator pedal was depressed however, the vehicle lunged backward. There was no warning light illuminated. The contact depressed the brake pedal to stop the vehicle. The vehicle was restarted; however, the failure recurred. The vehicle was taken to the dealer but was not diagnosed or repaired. The contact was informed by the dealer that the failure could not be duplicated. The manufacturer was made aware of the failure. The approximate failure mileage was 50,307.

NHTSA ODI 11631409

Mar 16, 2023Electrical systemSpeed controlLane Departure

There's a recall on the display monitor the screen will go black sometimes come back on sometimes never come back on there was a update to fix the issue if the update doesn't work they will have to change the display module or computer that controls it when I brought it to the dealer they want to charge me to replace the display or computer , I called the manufacturer and they refused to fix the recall problem

NHTSA ODI 11512281

Apr 6, 2021Electrical systemSpeed control

I EXPERIENCED AN INCIDENT WITH MY RECENTLY PURCHASED GLB 250 THAT MIRRORS EXACTLY THE 20200070009 RECALL THAT DOES NOT COVER MY VIN. AFTER RUNNING THE VEHICLE THROUGH A CAR WASH, THE DASHBOARD INSTRUMENT CLUSTER WENT BLANK, WITH NO ABILITY TO DETERMINE SPEED, FUEL LEVELS, ETC. WATER AFFECTED THE PROPER COMPONENT OPERATION FOR A PERIOD OF TIME, BUT DID EVENTUALLY RETURN.

NHTSA ODI 11406659

Working with the data? Download all 56 complaints as CSV · fetched from NHTSA July 18, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2020 Mercedes-benz GLB verdict →