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Fuel systemPart report

2020 Mercedes-Benz GLB 250 Fuel system Problems

Complaints
5about this part
Share
9%of 54 total for the year
Median mileage
28,410miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 5 complaints about the fuel system of the 2020 Mercedes-Benz GLB 250, 9% of the 54 complaints for this model year. Where a mileage was given, the median is 28,410 miles. 1 recall campaign on record is filed under a similar system.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“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 cylinder head was malfunctioning, which was a manufacturing defect and covered under an extended warranty, but now advised otherwise. Quote $2200.00. Mileage on vehicle 23,660.”

NHTSA complaint #11726066, filed 2026-03

“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. …”

NHTSA complaint #11489214, filed 2022-10, 54,000 miles

“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.”

NHTSA complaint #11570269, filed 2024-02, 45,000 miles

Related recalls

Related service bulletins

Fuel system: other model years

YearComplaintsShare of year
202319%
202219%
202127%
202059%

Other parts of the 2020 Mercedes-Benz GLB 250

Body and structure
14 complaintsOther or unknown
11 complaintsElectrical system
10 complaintsEngine
6 complaintsSuspension
6 complaintsAir bags
4 complaintsSteering
4 complaintsVehicle speed control
3 complaintsBack-over prevention (rear camera)
2 complaintsBrakes
2 complaintsTransmission and drivetrain
2 complaintsEquipment
1 complaints

← All problems reported for the 2020 Mercedes-Benz GLB 250

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology