Audi A7 55 TFSI e vs Mercedes-Benz C 400 e 4MATIC: real-world fuel use
In real life the Mercedes-Benz C 400 e 4MATIC uses 0.9 L/100 km less fuel than the Audi A7 55 TFSI e — about £185 a year at 15,000 km and £1.40/L.
287 cars in the data
Audi A7 55 TFSI e4.4×the official figure
Official
1.6
Real world
7.2
0510 L/100 km
385 cars in the data
Mercedes-Benz C 400 e 4MATIC10.1×the official figure
Official
0.6
Real world
6.3
0510 L/100 km
| Audi A7 55 TFSI e | Mercedes-Benz C 400 e 4MATIC | |
|---|---|---|
| Real fuel use (L/100 km) | 7.2 | 6.3 |
| Official fuel use (L/100 km) | 1.6 | 0.6 |
| Gap vs official | 4.4× | 10.1× |
| Distance with engine off | 26% | 32% |
| Real CO2 from fuel (g/km) | 165 | 145 |
| Official electric range (km) | 67 | 108 |
| Average kerb weight (kg) | 2,140 | 2,137 |
| Cars in the data | 287 | 385 |
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 C 400 e 4MATIC comes out ahead for the average owner. Your own result depends mostly on how often you charge. Owners drive the Audi A7 55 TFSI e 26% of the time with the engine off, and the Mercedes-Benz C 400 e 4MATIC 32%. Run the calculator with your own driving.