Mercedes-Benz · Standard SUVs · Hybrid
Mercedes-Benz GLS-Class Hybrid: MPG and annual fuel cost, 2026
The Mercedes-Benz GLS-Class Hybrid has 4 rated versions for 2026, from 15 to 21 MPG combined; its most efficient version is tied for 57th of 90 standard SUVs, in the lower half.
- 21MPG combinedtied 57th of 90 in class
- $3,900a year in fueltied 59th of 90 in class
- 428g/mile CO2
Where it stands
Compared only with the hybrid models of its class it is 17th of 25 hybrid standard SUVs, in the lower half. The median of that narrower group is 23 MPG, against 22.5 MPG for all standard SUVs together.
Across every class it is tied for 74th of 88 hybrid models, in the bottom quarter.
Mercedes-Benz has 22 models in the 2026 data. This one ranks 18th of them on combined rating, against a make median of 25.5 MPG.
In its class, just ahead of it is the Audi Q7 at 22 MPG and just behind it is the Audi Q7 Hybrid at 20 MPG.
Fuel cost and CO2
The file prices the fuel for its most efficient version at about $3,900 a year, assuming 15,000 miles a year with 55% of them in the city and premium gasoline at $5.48 per gallon. That is $525 more than the standard SUVs median of $3,375, which makes it tied for 59th of 90 standard SUVs, in the lower half.
Tailpipe CO2 is 428 g/mile, 41 g/mile above the standard SUVs median of 387.
Rated versions
In the city the most efficient version is rated 19 and on the highway 24, 5 better on the open road. 4 versions are rated for 2026. The most efficient, GLS450 4matic: 3.0 L, 6 cyl hybrid, Automatic 9-spd, AWD, gets 21 MPG; the least efficient listed, GLS600 4matic Maybach: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD, gets 15 MPG, a gap of 6 MPG. With the file's assumptions that gap is worth about $1,600 a year in fuel.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| GLS450 4matic: 3.0 L, 6 cyl hybrid, Automatic 9-spd, AWD | 21 | 19 | 24 | $3,900 | 428 |
| AMG GLS63 4matic Plus: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD | 17 | 15 | 20 | $4,850 | 538 |
| GLS580 4matic: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD | 16 | 14 | 20 | $5,150 | 539 |
| GLS600 4matic Maybach: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD | 15 | 13 | 18 | $5,500 | 585 |
Year by year
The Mercedes-Benz GLS-Class Hybrid is in the data for 7 of the 8 model years from 2019 to 2026. Its best combined rating is 21 MPG in both 2020 and 2026. The number of rated versions grew from 2 to 4.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2026 | 4 | 21 | 15 | $3,900 | 428 | 22.5 |
| 2025 | 4 | 21 | 15 | $3,900 | 428 | 22.5 |
| 2024 | 4 | 21 | 16 | $3,900 | 428 | 22 |
| 2023 | 4 | 20 | 16 | $4,100 | 433 | 21 |
| 2022 | 4 | 20 | 15 | $4,100 | 433 | 21 |
| 2021 | 4 | 21 | 16 | $3,900 | 414 | 20.5 |
| 2020 | 2 | 21 | 18 | $3,900 | 429 | 21 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Bentley Bentayga Plug-in hybrid | Plug-in hybrid | 21 | $3,900 | 2026 |
| Lincoln Aviator | Gasoline | 21 | $3,200 | 2026 |
| Land Rover Defender Hybrid | Hybrid | 20 | $4,100 | 2026 |
| Land Rover Range Rover Hybrid | Hybrid | 22 | $3,750 | 2026 |
| Toyota Sequoia Hybrid | Hybrid | 22 | $3,050 | 2026 |
Compare and rank
Rankings: Standard SUVs, Hybrid, Mercedes-Benz, Hybrid standard SUVs.
Data: US EPA and DOE, as prepared in methods and data.