Compact cars · Hybrid · model year 2026
BMW 3 Series Hybrid vs Mercedes-Benz C-Class Hybrid
The BMW 3 Series Hybrid edges the Mercedes-Benz C-Class Hybrid by only 2 MPG: 31 against 29 combined in model year 2026.
Side by side
| Measure | BMW 3 Series Hybrid | Mercedes-Benz C-Class Hybrid |
|---|---|---|
| Combined fuel economy (best version) | 31 MPG | 29 MPG |
| City | 28 MPG | 25 MPG |
| Highway | 35 MPG | 35 MPG |
| Annual fuel cost | $2,650 | $2,850 |
| Tailpipe CO2 | 286 g/mile | 307 g/mile |
| Lowest rated version | 29 MPG | 22 MPG |
| Rated versions | 4 | 3 |
| Rank in class (best combined rating) | 13th of 21 | 15th of 21 |
| Class | Compact cars | Compact cars |
| Powertrain | Hybrid | Hybrid |
Better figure in bold; each model's most efficient version.
Fuel economy and cost
Fuel bills differ by $200 a year. The BMW 3 Series Hybrid comes to $2,650 and the Mercedes-Benz C-Class Hybrid to $2,850, both at 15,000 miles a year.
Where each one ranks
Within their class the BMW 3 Series Hybrid is 13th of 21 compact cars, in the lower half. The Mercedes-Benz C-Class Hybrid is tied for 15th of 21 compact cars, in the lower half.
The BMW 3 Series Hybrid has 4 rated versions, from 29 to 31 MPG. The Mercedes-Benz C-Class Hybrid has 3, from 22 to 29 MPG. For the most efficient versions, the BMW 3 Series Hybrid is rated 7 higher on the highway (35 against 28), while the Mercedes-Benz C-Class Hybrid is rated 10 higher on the highway (35 against 25).
Their lineups meet at 29 MPG: 330i xDrive Sedan: 2.0 L, 4 cyl hybrid, Automatic (S8), AWD for the BMW 3 Series Hybrid and C300: 2.0 L, 4 cyl hybrid, Automatic 9-spd, RWD for the Mercedes-Benz C-Class Hybrid.
Ratings by model year
Both models are in the data for 5 model years, 2022 to 2026. The BMW 3 Series Hybrid has the higher best rating in 2 of them and the Mercedes-Benz C-Class Hybrid in 3. The widest gap, 4 MPG, was in 2024, when the Mercedes-Benz C-Class Hybrid led.
| Model year | BMW 3 Series Hybrid | Mercedes-Benz C-Class Hybrid | Gap |
|---|---|---|---|
| 2026 | 31 | 29 | +2 |
| 2025 | 31 | 29 | +2 |
| 2024 | 26 | 30 | -4 |
| 2023 | 26 | 29 | -3 |
| 2022 | 26 | 29 | -3 |