Mercedes-Benz · Minicompact cars · Gasoline
Mercedes-Benz SL-Class: MPG and annual fuel cost, 2026
The Mercedes-Benz SL-Class has 3 rated versions for 2026, from 16 to 16 MPG combined; its most efficient version is 12th of 12 minicompact cars, in the bottom quarter.
- 16MPG combined12th of 12 in class
- $5,150a year in fuel12th of 12 in class
- 552g/mile CO2
Where it stands
Compared only with the gasoline models of its class it is 9th of 9 gasoline minicompact cars, in the bottom quarter. The median of that narrower group is 19 MPG, against 20 MPG for all minicompact cars together.
Across every class it is tied for 169th of 180 gasoline models, in the bottom quarter.
Mercedes-Benz has 22 models in the 2026 data. This one ranks 21st of them on combined rating, against a make median of 25.5 MPG.
In its class, just ahead of it is the Aston Martin DB12 S at 17 MPG.
Fuel cost and CO2
At 15,000 miles a year with 55% of them in the city, with premium gasoline at $5.48 per gallon, the annual fuel bill of the most efficient version is about $5,150. That is $1,025 more than the minicompact cars median of $4,125.
It emits 552 g of CO2 per mile from the tailpipe; the minicompact cars median is 414.5, a difference of 138 g/mile.
Rated versions
In the city the most efficient version is rated 14 and on the highway 21, 7 better on the open road. 3 versions are rated for 2026. All of them share the same combined rating of 16 MPG.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| AMG SL55 4matic Plus: 4.0 L, 8 cyl, Automatic 9-spd, AWD | 16 | 14 | 21 | $5,150 | 552 |
| AMG SL63 4matic Plus: 4.0 L, 8 cyl, Automatic 9-spd, AWD | 16 | 14 | 21 | $5,150 | 552 |
| SL680 Maybach: 4.0 L, 8 cyl, Automatic 9-spd, AWD | 16 | 13 | 20 | $5,150 | 558 |
Year by year
The Mercedes-Benz SL-Class is in the data for 7 of the 8 model years from 2019 to 2026. Its best combined rating went from 23 in 2019 to 16 MPG in 2026, down 7 MPG. Fuel cost for the best version is $5,150 in the latest data against $3,550 in 2019, although the file applies today's fuel prices to every model year, so that change comes from the rating, not from prices.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2026 | 3 | 16 | 16 | $5,150 | 552 | 20 |
| 2025 | 2 | 16 | 16 | $5,150 | 558 | 21 |
| 2024 | 2 | 16 | 16 | $5,150 | 548 | 21.5 |
| 2023 | 2 | 16 | 16 | $5,150 | 562 | 20 |
| 2022 | 2 | 16 | 16 | $5,150 | 546 | 19.5 |
| 2020 | 2 | 22 | 20 | $3,750 | 395 | 20 |
| 2019 | 3 | 23 | 18 | $3,550 | 387 | 24 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Aston Martin DB12 V8 | Gasoline | 17 | $4,850 | 2026 |
| Lexus LC | Gasoline | 18 | $4,550 | 2026 |
| Ferrari Roma | Gasoline | 19 | $4,350 | 2026 |
| Bentley Continental Plug-in hybrid | Plug-in hybrid | 19 | $4,350 | 2026 |
| Porsche 911 | Gasoline | 21 | $3,900 | 2026 |
Compare and rank
Rankings: Minicompact cars, Gasoline, Mercedes-Benz.
Data: US EPA and DOE, as prepared in methods and data.