Large cars · Hybrid · model year 2026
BMW 7 Series Hybrid vs Mercedes-Benz S-Class Hybrid
For model year 2026, the BMW 7 Series Hybrid gets 28 MPG combined and the Mercedes-Benz S-Class Hybrid 23: a 5 MPG lead, or 22% on the lower figure.
Side by side
| Measure | BMW 7 Series Hybrid | Mercedes-Benz S-Class Hybrid |
|---|---|---|
| Combined fuel economy (best version) | 28 MPG | 23 MPG |
| City | 25 MPG | 20 MPG |
| Highway | 31 MPG | 29 MPG |
| Annual fuel cost | $2,950 | $3,550 |
| Tailpipe CO2 | 317 g/mile | 380 g/mile |
| Lowest rated version | 20 MPG | 20 MPG |
| Rated versions | 3 | 3 |
| Rank in class (best combined rating) | 13th of 25 | 15th of 25 |
| Class | Large cars | Large cars |
| Powertrain | Hybrid | Hybrid |
Better figure in bold; each model's most efficient version.
Fuel economy and cost
Under the file's assumptions the BMW 7 Series Hybrid costs about $2,950 a year to fuel and the Mercedes-Benz S-Class Hybrid about $3,550: $600 a year apart on 15,000 miles.
Where each one ranks
Within their class the BMW 7 Series Hybrid is 13th of 25 large cars, in the upper half, ahead of 50% of the others. The Mercedes-Benz S-Class Hybrid is tied for 15th of 25 large cars, in the lower half.
The BMW 7 Series Hybrid has 3 rated versions, from 20 to 28 MPG. The Mercedes-Benz S-Class Hybrid has 3, from 20 to 23 MPG. For the most efficient versions, the BMW 7 Series Hybrid is rated 6 higher on the highway (31 against 25), while the Mercedes-Benz S-Class Hybrid is rated 9 higher on the highway (29 against 20).
Their lineups meet at 20 MPG: 760i xDrive Sedan: 4.4 L, 8 cyl hybrid, Automatic (S8), AWD for the BMW 7 Series Hybrid and S580 4matic Maybach: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD for the Mercedes-Benz S-Class Hybrid.
Ratings by model year
Both models are in the data for 4 model years, 2023 to 2026. The BMW 7 Series Hybrid has the higher best rating in 4 of them and the Mercedes-Benz S-Class Hybrid in 0. The widest gap, 5 MPG, was in 2026, when the BMW 7 Series Hybrid led.
| Model year | BMW 7 Series Hybrid | Mercedes-Benz S-Class Hybrid | Gap |
|---|---|---|---|
| 2026 | 28 | 23 | +5 |
| 2025 | 28 | 24 | +4 |
| 2024 | 28 | 24 | +4 |
| 2023 | 27 | 23 | +4 |
| 2022 | not in data | 24 | n/a |
| 2021 | not in data | 24 | n/a |