- Hybrid
- Standard SUVs
- MY2017–2027
Mercedes-Benz GLS-Class MPG & Fuel Cost by Year
11 model years · 2017–2027
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Mercedes-Benz GLS-Class fuel economy at a glance
EPA has rated the Mercedes-Benz GLS-Class for 11 model years, 2017 to 2027. Across those years its combined rating runs 14–21 MPG. The latest model year, 2027, has 1 configuration rated 21 MPG combined and costing $3,880 a year to fuel at premium gasoline $5.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2017 is the 2027 GLS450 4matic 3.0L 6-cyl turbo supercharged AWD, at 21 MPG. Model year 2027 is still being filled in by EPA, so its row may gain configurations.
Mercedes-Benz GLS-Class MPG by year
| Year | Gas (MPG) | Hybrid (MPG) | $/yr |
|---|---|---|---|
| 2020-2027* (X167) Generation page | |||
| 2027 (partial) | — | 21 | $3,880 |
| 2026 | — | 15–21 | $3,860–$5,310 |
| 2025 | — | 15–21 | $3,860–$5,350 |
| 2024 | — | 16–21 | $3,860–$5,180 |
| 2023 | — | 16–20 | $3,950–$5,070 |
| 2022 | — | 15–20 | $3,940–$5,190 |
| 2021 | — | 16–21 | $3,750–$5,050 |
| 2020 | — | 18–21 | $3,880–$4,430 |
| 2017-2019 Generation page | |||
| 2019 | 15–18 | — | $4,410–$5,430 |
| 2018 | 15–19 | — | $4,320–$5,360 |
| 2017 | 14–19 | — | $4,320–$5,570 |
Costs use the current EIA price set and 15,000 miles a year for every year, so years are comparable. Green marks the best year for each powertrain.
Mercedes-Benz GLS-Class generations
2 generations between 2017 and 2027. Open one for the table of every model year and configuration.
2027 powertrain options
More Mercedes-Benz models
Frequently asked questions
What is the Mercedes-Benz GLS-Class's gas mileage by year?
EPA combined ratings for the Mercedes-Benz GLS-Class run 14–21 MPG across model years 2017 to 2027. The latest year, 2027, is rated 21 MPG.
Which Mercedes-Benz GLS-Class model year has the best gas mileage?
The 2027 Mercedes-Benz GLS-Class GLS450 4matic 3.0L 6-cyl turbo supercharged AWD has the highest combined rating since 2017, at 21 MPG.
How much does a Mercedes-Benz GLS-Class cost to fuel per year?
For MY2027, EPA-rated configurations cost $3,880 a year to fuel, driving 15,000 miles at premium gasoline $5.36/gal (U.S. average, Sep 2026). The most efficient one costs $3,880.
Has the Mercedes-Benz GLS-Class's fuel economy improved over time?
Yes. The most efficient configuration moved from 19 MPG in 2017 to 21 MPG in 2027, 2 MPG more.
Is there a hybrid, plug-in or electric Mercedes-Benz GLS-Class?
Yes. Hybrid versions are rated from 2020 to 2027 (15–21 MPG).
How many generations of the Mercedes-Benz GLS-Class are there?
EPA data covers 2 generations of the Mercedes-Benz GLS-Class: 2020-2027*, 2017-2019. Each has its own page with a table for every model year.