2020 Mercedes-Benz GLB 250 4MATIC Fuel system Problems
- Complaints
- 3about this part
- Share
- 38%of 8 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the fuel system of the 2020 Mercedes-Benz GLB 250 4MATIC, 38% of the 8 complaints for this model year.
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.
“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 gas mileage still says 0 and my engine light is on.”
NHTSA complaint #11735064, filed 2026-05“Extended warrenty information mercedez benz has issued warrenty to that applie to condistions as listed above (exhaust valve, cyliner head ) back 08/04/2023 the car has in mercedez benz and have failed to pick on the extended warrrenty repairs and we now find out this cased more damage to the engine and needs to replace camshat and , control valve, roller rocker arm, and engine camshaft follower . It's all because dealership failed and notfiy us of needed repairs . …”
NHTSA complaint #11744345, filed 2026-06Related service bulletins
- 11036999Aug 15, 2026Dear Mercedes-Benz Owner: In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA…
- 11035490Jul 31, 2026This NCU replaces the prior NCU issued on May 15, 2025, and contains additional MY 2023 and MY 2024 vehicles which are highlighted below.
Fuel system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2020 | 3 | 38% |
Other parts of the 2020 Mercedes-Benz GLB 250 4MATIC
4 complaintsElectrical system
3 complaintsAir bags
2 complaintsOther or unknown
1 complaintsSteering
1 complaintsSuspension
1 complaintsTransmission and drivetrain
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaintsWheels
1 complaints
← All problems reported for the 2020 Mercedes-Benz GLB 250 4MATIC
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