Mercedes A-Class — MPG & Fuel Costs 2025
Mercedes' premium compact hatchback. Plush interior, great infotainment, and strong diesel economy. The A 200d is particularly frugal.
The Mercedes-Benz A-Class is a highly popular premium hatchback, celebrated for its futuristic interior design, dual-screen dashboard, and advanced voice control system. It brings a level of luxury and tech down from Mercedes' larger saloon models.
Engine choices are broad, ranging from small petrol units developed with Renault to Mercedes' own highly refined 2.0-litre diesel engines (A 200d, A 220d). A plug-in hybrid (A 250e) is also available and highly rated for its electric range.
The A 200d diesel is one of the most efficient diesel cars on the market, achieving a real-world average of 57 MPG. The petrol A 180 and A 200 manage a respectable 41 MPG, making the A-Class highly economical to run.
TL;DR
41 MPG
Real-world petrol
57 MPG
Real-world diesel
43L
Tank capacity
£58.82
Full tank (petrol)
15.2p
Per mile (petrol)
Real-World Fuel Economy: The Mercedes A-Class achieves an estimated 41 MPG (petrol) and 57 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 43-litre tank completely costs approximately £58.82 (petrol) or £61.10 (diesel) at average UK fuel price rates.
Fuel economy at a glance
41
Real-world MPG
Petrol
48.7
Official WLTP
Petrol
57
Real-world MPG
Diesel
67.3
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £758 | £567 |
| 7,400 miles/yr(UK average) | £1122 | £839 |
| 10,000 miles/yr | £1517 | £1133 |
| 15,000 miles/yr | £2275 | £1700 |
| 20,000 miles/yr | £3034 | £2267 |
| Full tank (43L) | £58.82 | £61.10 |
| Cost per mile | 15.2p | 11.3p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the A-Class compare?
Tips to get better MPG from your A-Class
Use the 'Eco' display on the dashboard to score your driving style and adjust your acceleration inputs.
The A 250e PHEV is highly efficient if charged daily; use pure EV mode for commutes under 30 miles.
Upshift early using the steering wheel paddles if driving in manual mode to keep engine RPMs down.
Is the cheaper petrol station worth it?
In a Mercedes A-Class achieving ~41 MPG real-world, if you fill 34 litres and the alternative station is 10p/litre cheaper:
£3.40
Gross saving on fuel
£0.46
Cost of 3-mile detour
£2.94
Net saving ✓
You could drive up to 22 miles round-trip before the saving disappears entirely.
Calculate for your exact situationPopular variants
Frequently asked questions
What is the real-world MPG of the Mercedes A-Class?
The Mercedes A-Class achieves approximately 41 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 48.7 MPG due to real driving conditions. Diesel variants achieve around 57 MPG real-world.
How much does it cost to fill a Mercedes A-Class?
The Mercedes A-Class has a fuel tank of 43 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £58.82. Diesel costs approximately £61.10 for a full tank.
What is the annual fuel cost for a Mercedes A-Class?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Mercedes A-Class costs approximately £1122 per year in fuel. At 10,000 miles/year the cost rises to £1517. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Mercedes A-Class?
In a Mercedes A-Class doing ~41 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 34-litre fill nets approximately £2.94 after the extra fuel cost. You could drive up to 22 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Mercedes A-Class cost per mile in fuel?
The Mercedes A-Class costs approximately 15.2p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £4.56 per day in fuel.
What is the WLTP MPG figure for the Mercedes A-Class?
The official WLTP fuel economy figure for the Mercedes A-Class is 48.7 MPG. However, real-world MPG is typically 10–15% lower than WLTP due to cold starts, air conditioning, motorway speeds, and varying loads. WorthThePump uses a 12% real-world penalty to give a more accurate estimate.
Related guides
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