Mercedes-Benz · Large cars · Hybrid
Mercedes-Benz S-Class Hybrid: MPG and annual fuel cost, 2026
In model year 2026 the Mercedes-Benz S-Class Hybrid is rated at 23 MPG combined, tied for 15th of 25 large cars, in the lower half.
- 23MPG combinedtied 15th of 25 in class
- $3,550a year in fueltied 16th of 25 in class
- 380g/mile CO2
Where it stands
Compared only with the hybrid models of its class it is 5th of 8 hybrid large cars, in the lower half. The median of that narrower group is 25.5 MPG, against 28 MPG for all large cars together.
Among all hybrid models of the year, regardless of size, it is tied for 60th of 88 hybrid models, in the lower half.
Within the 22 Mercedes-Benz models rated for 2026 it is tied for 13th on combined rating; the median of the make's line-up is 25.5 MPG.
In its class, just ahead of it is the BMW 7 Series Plug-in hybrid at 24 MPG and just behind it is the Audi A8 Hybrid at 22 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 $3,550. That is $600 more than the large cars median of $2,950, which makes it tied for 16th of 25 large cars, in the lower half.
Tailpipe CO2 is 380 g/mile, 82 g/mile above the large cars median of 298.
Rated versions
Its city rating is 20 and its highway rating 29: the highway figure is 9 higher. 3 versions are rated for 2026. The most efficient, S500 4matic: 3.0 L, 6 cyl hybrid, Automatic 9-spd, AWD, gets 23 MPG; the least efficient listed, S580 4matic: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD, gets 20 MPG, a gap of 3 MPG. With the file's assumptions that gap is worth about $550 a year in fuel.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| S500 4matic: 3.0 L, 6 cyl hybrid, Automatic 9-spd, AWD | 23 | 20 | 29 | $3,550 | 380 |
| S580 4matic Maybach: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD | 20 | 16 | 27 | $4,100 | 451 |
| S580 4matic: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD | 20 | 17 | 27 | $4,100 | 438 |
Year by year
The Mercedes-Benz S-Class Hybrid is in the data for 6 of the 8 model years from 2019 to 2026. Between 2021 and 2026 the best combined rating fell by 1 MPG, from 24 to 23. Fuel cost for the best version is $3,550 in the latest data against $3,400 in 2021, 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 | 23 | 20 | $3,550 | 380 | 28 |
| 2025 | 3 | 24 | 20 | $3,400 | 364 | 26.5 |
| 2024 | 3 | 24 | 21 | $3,400 | 364 | 26.5 |
| 2023 | 3 | 23 | 18 | $3,550 | 388 | 23 |
| 2022 | 3 | 24 | 18 | $3,400 | 372 | 24 |
| 2021 | 3 | 24 | 19 | $3,400 | 372 | 23 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Genesis G80 | Gasoline | 23 | $3,550 | 2026 |
| Audi A8 Hybrid | Hybrid | 22 | $3,750 | 2026 |
| BMW 7 Series Plug-in hybrid | Plug-in hybrid | 24 | $3,400 | 2026 |
| Porsche Panamera | Gasoline | 21 | $3,900 | 2026 |
| Genesis G90 Hybrid | Hybrid | 20 | $4,100 | 2026 |
Compare and rank
Rankings: Large cars, Hybrid, Mercedes-Benz, Hybrid large cars.
Data: US EPA and DOE, as prepared in methods and data.