2020 Mercedes-Benz SL-Class
Fuel economy, running costs, emissions and safety · from U.S. EPA and NHTSA data
The 2020 Mercedes-Benz SL-Class is sold in the U.S. with gasoline power. The EPA lists 2 configurations for this model year, with combined economy from 20 to 22 MPG and an estimated annual fuel cost of $3,650 to $4,000 at 15,000 miles.
Key numbers
| Model year | 2020 |
|---|---|
| Vehicle class | Two Seaters |
| Fuel type(s) | Gasoline |
| Combined economy | 20-22 MPG |
| Best / worst combined | 22 / 20 MPG |
| Annual fuel cost | $3,650-$4,000 |
| Tailpipe CO₂ | 395-435 g/mi |
| EPA smog rating | 3-3 / 10 |
What it costs to fuel
Across its configurations, the 2020 SL-Class costs about $3,650 to $4,000 a year to fuel at the EPA's 15,000-mile basis, averaging roughly $3,825. Over five years that is about $19,125 in fuel alone before maintenance, insurance and depreciation — which is why the running cost, not just the price, decides what a car really costs.
Relative to an average new vehicle, this SL-Class configuration spends about $6,750 more on fuel over five years.
For context, the average combined economy of two seaters in this dataset is about 23 MPG. The SL-Class sits roughly 2 MPG below that mark at its midpoint, making it thirstier than average for its EPA class.
Configurations and fuel economy
| Version | Engine | Drive | Trans | Fuel | Combined | Annual fuel |
|---|---|---|---|---|---|---|
| SL450 | 3.0L 6-cyl turbo | Rear-Wheel | Automatic | Gasoline | 22 MPG | $3,650 |
| SL550 | 4.7L 8-cyl turbo | Rear-Wheel | Automatic | Gasoline | 20 MPG | $4,000 |
Emissions, safety and size
The 2020 SL-Class records tailpipe CO₂ of 395-435 g/mi, an EPA smog rating of 3-3 out of 10. The EPA classifies it as two seaters.
Compare this car
Open the comparison tool to line this 2020 SL-Class up against any other vehicle in the database, or jump to other years and trims from the 2020 Mercedes-Benz SL-Class overview.
← All Mercedes-Benz SL-Class years ← All Mercedes-Benz models
Data: U.S. EPA FuelEconomy.gov (public domain) and NHTSA SafetyRatings. Figures are EPA estimates; real-world results vary.