2025 · Subcompact Car · Gas
2025 Mercedes-Benz SL-Class MPG & fuel economy
The 2025 Mercedes-Benz SL-Class is a subcompact car with one EPA-rated configuration. The most efficient version returns 16 MPG combined (13 city / 21 highway) on premium gasoline. Efficiency is unchanged from the 2024 model. Among 30 subcompact cars rated for 2025, it ranks 30th for lowest fuel cost. At 15,000 miles a year with $3.95/gal premium gas, it costs about $3,703 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2025 Mercedes-Benz SL-Class's fuel average is 6.8 km/L (14.7 L/100 km), or 16 MPG combined: 5.5 km/L in the city and 8.9 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 13 | 5.5 | 18.1 |
| Highway | 21 | 8.9 | 11.2 |
| Combined | 16 | 6.8 | 14.7 |
How it ranks among 2025 Subcompact Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
SL-Class MPG across model years
Full history →1 EPA-rated configuration
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| AWD · 4.0L 8-cyl turbo · 9-speed automatic AMG SL63 4matic Plus |
Gas | 13 MPG | 21 MPG | 16 MPG | — | $3,703 |
Specs (most efficient configuration)
- Fuel
- Premium gasoline
- Engine / motor
- 4.0L 8-cyl turbo
- Transmission
- 9-speed automatic
- Drivetrain
- AWD
- Passenger volume
- 76 cu ft
- Cargo volume
- 6 cu ft
- Tailpipe CO₂
- 558 g/mi
- EPA fuel economy score
- 3/10
- EPA greenhouse gas score
- 3/10
2025 Mercedes-Benz SL-Class vs. rivals
Compare the 2025 SL-Class
With any other car from any year, including other SL-Class model years. Type a year to jump, e.g. "2015 Accord".
Same year, other powertrains: 2025 Mercedes-Benz SL-Class Hybrid (22 MPG), 2025 Mercedes-Benz SL-Class Plug-in Hybrid (29 MPGe + 18 MPG)
Frequently asked questions
What is the gas mileage of the 2025 Mercedes-Benz SL-Class?
Up to 16 MPG combined (13 city / 21 highway).
What fuel does the 2025 Mercedes-Benz SL-Class use?
Premium gasoline (premium is required or recommended by the manufacturer).
What is the fuel average in km/L for the 2025 Mercedes-Benz SL-Class?
The 2025 Mercedes-Benz SL-Class's fuel average is 6.8 km/L (14.7 L/100 km), or 16 MPG combined: 5.5 km/L in the city and 8.9 km/L on the highway.
How much does it cost to fuel the 2025 Mercedes-Benz SL-Class per year?
About $3,703 at 15,000 miles a year with $3.95/gal premium gas, or $24.69 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.