Mercedes-benz Glb-class Engine Problems
19 owner complaints filed with NHTSA across 4 model years.
Complaints by Year
Worst year: 2020. Best year: 2021.
Owner Reports
A representative sample of complaints filed with NHTSA.
The vehicle was operating normally the previous night. We drove it and parked it in the driveway that evening, and it was not used again after that. The following morning, we started the vehicle to allow it to warm up and then returned i...
this car really has a lot of issues and honestly if I didn’t know what to do last night and didn’t know about cars, it could have seriously cost me my life but luckily I was able to move out the way of a truck that was coming fast be...
Safety Risk - Twice I was almost hit because my car didn't take off. O'REILLY Veri Scan Results - Free Emissions Status: Red Primary DTC: Mixture Formation (Cylinder 4) is irregular P219F: Fuel injectors measure and atomize fuel mixed wi...
I have a passenger malfunction with airbags warning coming. I also just experienced getting gas. My milage counted down to zero which it never has before and my engine light came on. I went and got gas 3 times spending around $70 and my ...
My 2023 Mercedes-Benz GLB 250 is experiencing engine misfires and fault codes consistent with a known cylinder head defect that is the subject of a recall affecting 2022 and earlier models. A certified mechanic has confirmed the issue al...
Diagnostics performed and found electrical/component fault and possible wire damage to fuel pump. NECC to drain tank and inspect replace fule pump if necc. Oringally took one week prior and diagnostics led to the possiblility that the cy...
On December 19, 2025, the vehicle showed lights that a sparkplug had misfired. The dealer notified me that in less than two full years of having the 2023 vehicle, it required a complete engine rebuild. This is the third major engine prob...
Cylinder repair dealership said it's a known issue but Mercedes Benz said they will not cover the repair.
My fuel injection has been replaced 2 times in 3 years. Was advised that it could cause damages to other parts
The engine made a knocking sound and i pulled over on the side of the road took the car to MB dealership to get the recall fixed but i was told the recall cannot be fixed until the engine is fixed. MBUSA refuses to replace the engine eve...
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...
ON 3/23/2021, MY GLB 250 STARTED EXPERIENCING ELECTRICAL AND ENGINE ISSUES AFTER I HAD BEEN STOPPED AT A RAILROAD CROSSING FOR 15 MINUTES WITH THE ENGINE RUNNING AND THE CAR IN PARK. ONCE THE TRAIN PASSED AND I WAS ABLE TO DRIVE, MY IN...