Audi A6 Avant 55 TFSI e vs Mercedes-Benz E 300 de: real-world fuel use
In real life the Mercedes-Benz E 300 de uses 1.5 L/100 km less fuel than the Audi A6 Avant 55 TFSI e — about £315 a year at 15,000 km and £1.40/L.
4,531 cars in the data
Audi A6 Avant 55 TFSI e5.0×the official figure
Official
1.4
Real world
7.2
0510 L/100 km
12,044 cars in the data
Mercedes-Benz E 300 de4.9×the official figure
Official
1.1
Real world
5.7
0510 L/100 km
| Audi A6 Avant 55 TFSI e | Mercedes-Benz E 300 de | |
|---|---|---|
| Real fuel use (L/100 km) | 7.2 | 5.7 |
| Official fuel use (L/100 km) | 1.4 | 1.1 |
| Gap vs official | 5.0× | 4.9× |
| Distance with engine off | 25% | 15% |
| Real CO2 from fuel (g/km) | 165 | 149 |
| Official electric range (km) | 72 | 63 |
| Average kerb weight (kg) | 2,150 | 2,156 |
| Cars in the data | 4,531 | 12,044 |
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 E 300 de comes out ahead for the average owner. Your own result depends mostly on how often you charge. Owners drive the Audi A6 Avant 55 TFSI e 25% of the time with the engine off, and the Mercedes-Benz E 300 de 15%. Run the calculator with your own driving.