Standard SUVs · Hybrid · model year 2026
BMW X5 Hybrid vs Mercedes-Benz GLS-Class Hybrid
For model year 2026, the BMW X5 Hybrid gets 25 MPG combined and the Mercedes-Benz GLS-Class Hybrid 21: a 4 MPG lead, or 19% on the lower figure.
Side by side
| Measure | BMW X5 Hybrid | Mercedes-Benz GLS-Class Hybrid |
|---|---|---|
| Combined fuel economy (best version) | 25 MPG | 21 MPG |
| City | 23 MPG | 19 MPG |
| Highway | 27 MPG | 24 MPG |
| Annual fuel cost | $3,300 | $3,900 |
| Tailpipe CO2 | 360 g/mile | 428 g/mile |
| Lowest rated version | 15 MPG | 15 MPG |
| Rated versions | 4 | 4 |
| Rank in class (best combined rating) | 27th of 90 | 57th of 90 |
| Class | Standard SUVs | Standard SUVs |
| Powertrain | Hybrid | Hybrid |
Better figure in bold; each model's most efficient version.
Fuel economy and cost
Under the file's assumptions the BMW X5 Hybrid costs about $3,300 a year to fuel and the Mercedes-Benz GLS-Class Hybrid about $3,900: $600 a year apart on 15,000 miles.
Where each one ranks
Within their class the BMW X5 Hybrid is tied for 27th of 90 standard SUVs, in the upper half. The Mercedes-Benz GLS-Class Hybrid is tied for 57th of 90 standard SUVs, in the lower half.
The BMW X5 Hybrid has 4 rated versions, from 15 to 25 MPG. The Mercedes-Benz GLS-Class Hybrid has 4, from 15 to 21 MPG. For the most efficient versions, the BMW X5 Hybrid is rated 4 higher on the highway (27 against 23), while the Mercedes-Benz GLS-Class Hybrid is rated 5 higher on the highway (24 against 19).
Their lineups meet at 15 MPG: X5 M Competition: 4.4 L, 8 cyl hybrid, Automatic (S8), AWD for the BMW X5 Hybrid and GLS600 4matic Maybach: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD for the Mercedes-Benz GLS-Class Hybrid.
Ratings by model year
Both models are in the data for 6 model years, 2021 to 2026. The BMW X5 Hybrid has the higher best rating in 6 of them and the Mercedes-Benz GLS-Class Hybrid in 0. The widest gap, 4 MPG, was in 2026, when the BMW X5 Hybrid led.
| Model year | BMW X5 Hybrid | Mercedes-Benz GLS-Class Hybrid | Gap |
|---|---|---|---|
| 2026 | 25 | 21 | +4 |
| 2025 | 25 | 21 | +4 |
| 2024 | 25 | 21 | +4 |
| 2023 | 23 | 20 | +3 |
| 2022 | 23 | 20 | +3 |
| 2021 | 23 | 21 | +2 |
| 2020 | not in data | 21 | n/a |