Audi A6 55 TFSI e vs Mercedes-Benz C 300 e: real-world fuel use
In real life the Mercedes-Benz C 300 e uses 1.6 L/100 km less fuel than the Audi A6 55 TFSI e — about £326 a year at 15,000 km and £1.40/L.
535 cars in the data
Audi A6 55 TFSI e5.3×the official figure
Official
1.3
Real world
7.0
0510 L/100 km
30,743 cars in the data
Mercedes-Benz C 300 e8.8×the official figure
Official
0.6
Real world
5.4
0510 L/100 km
| Audi A6 55 TFSI e | Mercedes-Benz C 300 e | |
|---|---|---|
| Real fuel use (L/100 km) | 7.0 | 5.4 |
| Official fuel use (L/100 km) | 1.3 | 0.6 |
| Gap vs official | 5.3× | 8.8× |
| Distance with engine off | 26% | 33% |
| Real CO2 from fuel (g/km) | 161 | 125 |
| Official electric range (km) | 73 | 108 |
| Average kerb weight (kg) | 2,085 | 2,103 |
| Cars in the data | 535 | 30,743 |
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 300 e comes out ahead for the average owner. Your own result depends mostly on how often you charge. Owners drive the Audi A6 55 TFSI e 26% of the time with the engine off, and the Mercedes-Benz C 300 e 33%. Run the calculator with your own driving.