The Mercedes-Benz GLB-Class does 27.1 mpg combined (24.1 city, 32 highway), which works out to about $1,417 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 2L 4-cyl Hybrid does 28 mpg while 2L 4-cyl does 26.5 — a difference of $78 a year. Against other 4-cyl cars it sits above the average of 25.7 mpg.
Every Mercedes-Benz GLB-Class engine, compared
Gas mileage on the Mercedes-Benz GLB-Class ranges from 28 down to 26.5 depending on which engine sits under the bonnet — a spread of $78 a year across 2 versions of the same car. Picking the right one often saves more fuel than picking a different car altogether. 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
The Mercedes-Benz GLB-Class burns a gallon every 27.1 miles, so 12,000 miles takes about 443 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.118 |
| Fuel per year | $1,417 |
| Fuel over five years | $7,085 |
| Against other 4-cyl cars | −$77 a year |
| EPA's own estimate | $2,836 a year |
City or highway — who is this car for
The Mercedes-Benz GLB-Class gives up 7.9 mpg the moment you leave the motorway — 32 out there against 24.1 in town, a 33% drop worth $393 a year. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 24.1 mpg | $1,593 a year if you only drive in town |
| Highway | 32 mpg | $1,200 a year if you mostly commute |
| Gap | +7.9 mpg (33%) | 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. The 2026 car does 28. Jumps usually mark a new generation or a new engine; dips often mean a heavier body or added all-wheel drive.
| 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.
- Fuel profile built from your actual mileage and local prices
- Fuel tracker: what you really spend, month by month
- Insurance and fuel folded into 5-year cost to own
- Compare any two cars on total cost, not sticker price
- No ads, no tracking — and much more
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 Mercedes-Benz GLB-Class get?
27.1 mpg combined on average — 24.1 in the city and 32 on the highway, per EPA ratings across 2020–2026.
How much does a Mercedes-Benz GLB-Class cost in fuel per year?
About $1,417 at 12,000 miles and $3.20 a gallon — roughly $7,085 over five years, or 0.118 dollars a mile.
Which GLB-Class engine is the most economical?
The 2L 4-cyl Hybrid at 28 mpg, against 26.5 for the 2L 4-cyl — a difference of about $78 a year.
Is the GLB-Class good on fuel compared with similar cars?
Against other 4-cyl cars it sits above the average of 25.7 mpg, computed across 4765 ratings.
Are these real-world GLB-Class figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Mercedes-Benz GLB-Class is $2,836 against the $1,417 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 28 and 26 mpg versions of this car is smaller than the spread between two drivers of the same one.
Mark ForCar as a preferred source and our data shows up first in your Google results. One click, no account.