2022 head-to-head · Small SUV
2022 Lexus RX vs Mercedes-Benz GLB-Class
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2022 Lexus RX is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, it costs about $2,022 a year to fuel (23 MPG), versus $2,194 for the 2022 Mercedes-Benz GLB-Class (27 MPG). That's roughly $173 a year, or about $864 over five years.
Your numbers
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Fuel cost over 10 years
- Lexus RX
- Mercedes-Benz GLB-Class
Side by side
| Lexus RX | Mercedes-Benz GLB-Class | |
|---|---|---|
| $2,022 | Your annual fuel cost | $2,194 |
| 23 MPG | Combined efficiency | 27 MPG |
| 20 MPG | City | 24 MPG |
| 27 MPG | Highway | 32 MPG |
| 391 g/mi | Tailpipe CO₂ (g/mi) | 330 g/mi |
| 5/10 | EPA fuel economy score | 6/10 |
| 5/10 | EPA greenhouse gas score | 6/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Premium gasoline |
| 3.5L 6-cyl | Engine / motor | 2.0L 4-cyl turbo |
| 8-speed automatic | Transmission | 8-speed dual-clutch |
| FWD | Drivetrain | FWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Lexus RX vs Mercedes-Benz GLB-Class across model years
- Lexus RX
- Mercedes-Benz GLB-Class
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Among 106 2022 small SUVs, the Lexus RX ranks 66th and the Mercedes-Benz GLB-Class 77th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2022 Lexus RX or the 2022 Mercedes-Benz GLB-Class?
Measured by cost to drive, the Lexus RX. The Lexus RX is rated 23 MPG combined and the Mercedes-Benz GLB-Class 27 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2022 Lexus RX vs. the Mercedes-Benz GLB-Class per year?
At 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, about $2,022 for the Lexus RX and $2,194 for the Mercedes-Benz GLB-Class.
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