Vehicle Guides

Mercedes MPG Guides — Real-World Fuel Economy

Real-world fuel economy and annual running costs for all 15 Mercedes models. Official WLTP figures adjusted for UK driving conditions — typically 12% lower than lab results.

15

Mercedes models

2442

Real-world MPG range

£1096

Cheapest annual fuel cost

£1918

Highest annual fuel cost

All Mercedes models — sorted by fuel efficiency

Most fuel efficient

Mercedes B-Class

42 MPG

real-world driving

View full guide

Highest running cost

Mercedes SL

24 MPG

real-world driving

View full guide

Frequently asked questions

Which Mercedes is most fuel efficient?

The most fuel-efficient Mercedes in our database is the Mercedes B-Class, achieving approximately 42 MPG in real-world UK driving conditions.

What is the cheapest Mercedes to run on fuel?

The cheapest Mercedes to run on fuel at the current UK average annual mileage of 7,400 miles costs approximately £1096 per year. The most fuel-efficient variant is the Mercedes B-Class.

What MPG does a Mercedes get in real-world driving?

Mercedes models achieve between 24 and 42 MPG in real-world UK driving, depending on the model and engine. Official WLTP figures are typically 12% higher than real-world results due to laboratory test conditions.

How much does it cost to fill a Mercedes?

Mercedes fuel tank sizes range from 43L to 85L depending on the model. At the current UK average petrol price of 136.8p/litre, a full tank costs between £59 and £116.

Compare with other makes

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