Against 344 other Hybrid cars rated 2024–2026, the GLB-Class sits right on their 28 mpg average. Averaged over the years each was sold, the most economical engine since 2020, the 2L 4-cyl Hybrid (2024–2026), does 28 mpg and the thirstiest, the 2L 4-cyl (2020–2023), 26.5: $78 a year apart.
Every Mercedes-Benz GLB-Class engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2L 4-cyl Hybrid | 25 / 33 | 2024–2026 | $1,371 | |
| 2L 4-cyl | 23.5 / 31.3 | 2020–2023 | $1,449 |
What that actually costs
| Measure | Value |
|---|---|
| Cost per mile (2026) | $0.114 |
| Fuel per year | $1,371 |
| Fuel over five years | $6,855 |
| Against other Hybrid cars, 2024–2026 | about the same |
| EPA's own estimate | $2,836 a year |
City or highway — who is this car for
The 2026 Mercedes-Benz GLB-Class gives up 8 mpg in town: 33 on the highway against 25 in the city, $372 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2026) | 25 mpg | $1,536 a year if you only drive in town |
| Highway | 33 mpg | $1,164 a year if you mostly commute |
| Gap | +8 mpg (32%) | Wide — this car dislikes traffic |
How the GLB-Class changed over the years
The GLB-Class peaked in 2026 at 28 mpg (25 city, 33 highway) and was at its thirstiest in 2021 at 26 — 2 mpg apart, or $106 a year in fuel between buying one year and the other.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2026 | 25 / 33 | 1 | $1,371 | |
| 2025 | 25 / 33 | 1 | $1,371 | |
| 2024 | 25 / 33 | 1 | $1,371 | |
| 2023 | 24 / 32 | 1 | $1,422 | |
| 2022 | 24 / 32 | 1 | $1,422 | |
| 2021 | 23 / 31 | 1 | $1,477 | |
| 2020 | 23 / 30 | 1 | $1,477 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 7 EPA ratings of the Mercedes-Benz GLB-Class — 2 engines across 2020–2026. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $2,836. Full method.
Frequently asked questions
What mpg does the 2026 Mercedes-Benz GLB-Class get?
28 mpg combined, 25 city and 33 highway, per EPA. Across every year since 2020 the GLB-Class has averaged 27.1 mpg.
Is the 2026 GLB-Class more efficient than the 2025?
About the same: 28 against 28 mpg combined.
Which GLB-Class year has the best gas mileage?
The 2026, at 28 mpg combined (25 city, 33 highway), which is also the latest model year we hold.
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