BMW 750e xDrive vs Mercedes-Benz S 450 e: real-world fuel use
In real life the Mercedes-Benz S 450 e uses 1.8 L/100 km less fuel than the BMW 750e xDrive — about £380 a year at 15,000 km and £1.40/L.
970 cars in the data
BMW 750e xDrive7.4×the official figure
Official
1.1
Real world
8.0
0510 L/100 km
214 cars in the data
Mercedes-Benz S 450 e9.5×the official figure
Official
0.7
Real world
6.2
0510 L/100 km
| BMW 750e xDrive | Mercedes-Benz S 450 e | |
|---|---|---|
| Real fuel use (L/100 km) | 8.0 | 6.2 |
| Official fuel use (L/100 km) | 1.1 | 0.7 |
| Gap vs official | 7.4× | 9.5× |
| Distance with engine off | 23% | 31% |
| Real CO2 from fuel (g/km) | 186 | 144 |
| Official electric range (km) | 79 | 111 |
| Average kerb weight (kg) | 2,455 | 2,402 |
| Cars in the data | 970 | 214 |
Bold = better. Source: EEA OBFCM real-world data, reporting year 2024, CC BY 4.0.
Which one is cheaper to run?
On fuel alone, the Mercedes-Benz S 450 e comes out ahead for the average owner. Your own result depends mostly on how often you charge. Owners drive the BMW 750e xDrive 23% of the time with the engine off, and the Mercedes-Benz S 450 e 31%. Run the calculator with your own driving.