Mercedes-Benz GLB250 4matic
27 MPG The 2026 Mercedes-Benz GLB250 4matic is EPA-rated at 27 MPG combined (24 city / 33 highway). Over 15,000 miles a year that is about 556 gallons, $1778 a year in fuel, or $0.119 per mile at $3.20/gal.
Across its full 2020–2026 run it averages 26.1 MPG, improving by 1 MPG over 7 model years.
Running cost at different fuel prices and mileages
The figure everyone actually wants, and the one the EPA does not publish — because it depends on a fuel price no agency will commit to.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.093 | $926 | $1389 | $1852 |
| $3.00/gal | $0.111 | $1111 | $1667 | $2222 |
| $3.20/gal | $0.119 | $1185 | $1778 | $2370 |
| $3.50/gal | $0.130 | $1296 | $1944 | $2593 |
| $4.00/gal | $0.148 | $1481 | $2222 | $2963 |
| $4.50/gal | $0.167 | $1667 | $2500 | $3333 |
| $5.00/gal | $0.185 | $1852 | $2778 | $3704 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2026 | 27 MPG | 24 | 33 | $2850 | 324 | 1 |
| 2025 | 27 MPG | 24 | 33 | $2850 | 324 | 1 |
| 2024 | 27 MPG | 24 | 32 | $2850 | 330 | 1 |
| 2023 | 25 MPG | 22 | 30 | $3100 | 355 | 1 |
| 2022 | 25 MPG | 22 | 30 | $3100 | 361 | 1 |
| 2021 | 26 MPG | 23 | 30 | $2950 | 347 | 1 |
| 2020 | 26 MPG | 23 | 31 | $2950 | 338 | 1 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
How it compares in its class
Among the 130 small sport utility vehicle 4wd models tracked here, the Mercedes-Benz GLB250 4matic ranks 31 on current figures, against a class average of 29.2 MPG.
Closest more-efficient alternatives in the same class: Mercedes-Benz GLA250 4matic (28), Toyota RAV4 AWD TRD OFFROAD (28), Volkswagen Taos 4motion (28), Toyota RAV4 AWD (28.5), BMW X3 xDrive30i (29).
Tailpipe CO₂ is rated at 324 grams per mile, which works out to roughly 4.9 tonnes a year at 15,000 miles.
Questions
What MPG does the Mercedes-Benz GLB250 4matic get?
The 2026 Mercedes-Benz GLB250 4matic is rated at 27 MPG combined by the EPA — 24 city and 33 highway. Across all 7 model years in the database it averages 26.1 MPG, ranging from 25 to 27 depending on year and trim.
How much does a Mercedes-Benz GLB250 4matic cost in fuel per year?
At 27 MPG and 15,000 miles a year, it burns about 556 gallons — roughly $1778 a year with fuel at $3.20 a gallon, or $0.119 per mile. The EPA's own published annual figure for the 2026 model is $2850.
Has the Mercedes-Benz GLB250 4matic become more efficient over time?
Yes. It has gone from 26 MPG in 2020 to 27 in 2026 — an improvement of 1 MPG, or 4% across 7 model years.
Is the Mercedes-Benz GLB250 4matic efficient for its class?
It ranks 31 of 130 in the Small Sport Utility Vehicle 4WD class on current figures, against a class average of 29.2 MPG. That is 2.2 worse than typical for the class.
EPA test figures from fueleconomy.gov. Cost per mile and annual fuel spend are computed at a reference price of $3.20 per gallon — use your own price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.