2021 · Small SUV · Gas
2021 Mercedes-Benz GLB-Class MPG & fuel economy
The 2021 Mercedes-Benz GLB-Class is a small SUV offered in 3 EPA-rated configurations. The most efficient version returns 26 MPG combined (23 city / 31 highway) on premium gasoline. Across the lineup, combined ratings range from 23 to 26 MPG. Efficiency is unchanged from the 2020 model. Among 92 small SUVs rated for 2021, it ranks 74th for lowest fuel cost. At 15,000 miles a year with $3.95/gal premium gas, it costs about $2,279 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2021 Mercedes-Benz GLB-Class's fuel average is 11.1 km/L (9.0 L/100 km), or 26 MPG combined: 9.8 km/L in the city and 13.2 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 23 | 9.8 | 10.2 |
| Highway | 31 | 13.2 | 7.6 |
| Combined | 26 | 11.1 | 9.0 |
How it ranks among 2021 Small SUVs
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
GLB-Class MPG across model years
Full history →3 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| FWD · 2.0L 4-cyl turbo · 8-speed dual-clutch GLB250 |
Gas | 23 MPG | 31 MPG | 26 MPG | — | $2,279 |
| 4WD · 2.0L 4-cyl turbo · 8-speed dual-clutch GLB250 4matic |
Gas | 23 MPG | 30 MPG | 26 MPG | — | $2,279 |
| 4WD · 2.0L 4-cyl turbo · 8-speed dual-clutch AMG GLB35 4matic |
Gas | 21 MPG | 26 MPG | 23 MPG | — | $2,576 |
Specs (most efficient configuration)
- Fuel
- Premium gasoline
- Engine / motor
- 2.0L 4-cyl turbo
- Transmission
- 8-speed dual-clutch
- Drivetrain
- FWD
- Tailpipe CO₂
- 337 g/mi
- EPA fuel economy score
- 5/10
- EPA greenhouse gas score
- 5/10
2021 Mercedes-Benz GLB-Class vs. rivals
Compare the 2021 GLB-Class
With any other car from any year, including other GLB-Class model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 2021 Mercedes-Benz GLB-Class?
Up to 26 MPG combined (23 city / 31 highway); ratings range from 23 to 26 MPG depending on configuration.
What fuel does the 2021 Mercedes-Benz GLB-Class use?
Premium gasoline (premium is required or recommended by the manufacturer).
What is the fuel average in km/L for the 2021 Mercedes-Benz GLB-Class?
The 2021 Mercedes-Benz GLB-Class's fuel average is 11.1 km/L (9.0 L/100 km), or 26 MPG combined: 9.8 km/L in the city and 13.2 km/L on the highway.
How much does it cost to fuel the 2021 Mercedes-Benz GLB-Class per year?
About $2,279 at 15,000 miles a year with $3.95/gal premium gas, or $15.19 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.