- Newest year: 2027
- Hybrid
- Standard SUVs
- Partial model year
2020-2027 Mercedes-Benz GLS-Class MPG & Fuel Cost
8 model years · 15–21 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 3 of 10 standard SUV configurations, MY2027. Ranked against all rated configurations, not sales-weighted.
2020-2027 Mercedes-Benz GLS-Class at a glance
The 2020-2027 Mercedes-Benz GLS-Class covers 8 model years in the EPA database (27 configurations in all), rated 15–21 MPG combined. The newest model year, 2027, costs about $3,880 a year to fuel for its most efficient version, the GLS450 4matic 3.0L 6-cyl turbo supercharged AWD (21 MPG), at premium gasoline $5.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2021, 2022, 2023, 2024, 2025, 2026 and 2027. The best combined rating in the generation, 21 MPG, was reached in 2020, 2021, 2024, 2025, 2026 and 2027.
Model year 2027 is still being filled in by EPA (1 configuration listed so far), so rows may be added.
2020-2027 Mercedes-Benz GLS-Class by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2027 (partial) | Hybrid | 21 MPG | $3,880 | Ratings changed |
| 2026 | Hybrid | 15–21 MPG | $3,860–$5,310 | Ratings changed |
| 2025 | Hybrid | 15–21 MPG | $3,860–$5,350 | Ratings changed |
| 2024 | Hybrid | 16–21 MPG | $3,860–$5,180 | Ratings changed |
| 2023 | Hybrid | 16–20 MPG | $3,950–$5,070 | Ratings changed |
| 2022 | Hybrid | 15–20 MPG | $3,940–$5,190 | Ratings changed |
| 2021 | Hybrid | 16–21 MPG | $3,750–$5,050 | Ratings changed |
| 2020 | Hybrid | 18–21 MPG | $3,880–$4,430 | First year |
What the 2027 GLS450 4matic 3.0L 6-cyl turbo supercharged AWD costs to drive
Per month
$323
$3,880 a year ÷ 12
Per 25 miles
$6.47
Per 100 miles
$25.87
Five years
$19,400
5 × the yearly cost, prices held at today's level
vs the standard SUV median
$720more a year
Class median $3,160 a year, MY2027
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2027 Mercedes-Benz GLS-Class MPG
Model year 2027 is still being filled in by EPA (1 configuration listed so far), so rows may be added.
Versus 2026: The most efficient configuration stays at 21 MPG. Its annual cost goes from $3,860 to $3,880, $20 more.
Hybrid configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo supercharged | AWD | 19 | 24 | 21 | $3,880 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2026 Mercedes-Benz GLS-Class MPG
15–21 MPG · $3,860–$5,310/yr
Versus 2025: The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,860.
Hybrid configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo supercharged | AWD | 19 | 24 | 21 | $3,860 |
| AMG GLS63 4matic Plus | 4.0L 8-cyl turbo | AWD | 15 | 20 | 17 | $4,850 |
| GLS580 4matic | 4.0L 8-cyl turbo | AWD | 14 | 20 | 16 | $4,880 |
| GLS600 4matic Maybach | 4.0L 8-cyl turbo | AWD | 13 | 18 | 15 | $5,310 |
4 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2025 Mercedes-Benz GLS-Class MPG
15–21 MPG · $3,860–$5,350/yr
Versus 2024: The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,860.
Hybrid configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo supercharged | AWD | 19 | 24 | 21 | $3,860 |
| GLS580 4matic | 4.0L 8-cyl turbo | AWD | 14 | 19 | 16 | $4,990 |
| AMG GLS63 4matic Plus | 4.0L 8-cyl turbo | AWD | 14 | 18 | 15 | $5,240 |
| GLS600 4matic Maybach | 4.0L 8-cyl turbo | AWD | 13 | 18 | 15 | $5,350 |
4 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2024 Mercedes-Benz GLS-Class MPG
16–21 MPG · $3,860–$5,180/yr
Versus 2023: The most efficient configuration moves from 20 to 21 MPG, up 1. Its annual cost goes from $3,950 to $3,860, $90 less.
Hybrid configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo | AWD | 19 | 24 | 21 | $3,860 |
| GLS580 4matic | 4.0L 8-cyl turbo | AWD | 14 | 20 | 16 | $5,000 |
| AMG GLS63 4matic Plus | 4.0L 8-cyl turbo | AWD | 14 | 18 | 16 | $5,090 |
| GLS600 4matic Maybach | 4.0L 8-cyl turbo | AWD | 14 | 19 | 16 | $5,180 |
4 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2023 Mercedes-Benz GLS-Class MPG
16–20 MPG · $3,950–$5,070/yr
Versus 2022: The most efficient configuration stays at 20 MPG. Its annual cost goes from $3,940 to $3,950, $10 more.
Hybrid configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo | AWD | 18 | 23 | 20 | $3,950 |
| GLS580 4matic | 4.0L 8-cyl turbo | AWD | 16 | 21 | 18 | $4,520 |
| GLS600 4matic Maybach | 4.0L 8-cyl turbo | AWD | 15 | 20 | 17 | $4,790 |
| AMG GLS63 4matic Plus | 4.0L 8-cyl turbo | AWD | 14 | 19 | 16 | $5,070 |
4 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2022 Mercedes-Benz GLS-Class MPG
15–20 MPG · $3,940–$5,190/yr
Versus 2021: The most efficient configuration moves from 21 to 20 MPG, down 1. Its annual cost goes from $3,750 to $3,940, $190 more.
Hybrid configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo | 4WD | 18 | 24 | 20 | $3,940 |
| GLS580 4matic | 4.0L 8-cyl turbo | AWD | 16 | 21 | 18 | $4,540 |
| GLS600 4matic Maybach | 4.0L 8-cyl turbo | AWD | 14 | 20 | 17 | $4,870 |
| AMG GLS63 4matic Plus | 4.0L 8-cyl turbo | AWD | 14 | 18 | 15 | $5,190 |
4 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2021 Mercedes-Benz GLS-Class MPG
16–21 MPG · $3,750–$5,050/yr
Versus 2020: The most efficient configuration stays at 21 MPG. Its annual cost goes from $3,880 to $3,750, $130 less.
Hybrid configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo | 4WD | 20 | 24 | 21 | $3,750 |
| GLS580 4matic | 4.0L 8-cyl turbo | 4WD | 16 | 21 | 18 | $4,450 |
| GLS600 4matic Maybach | 4.0L 8-cyl turbo | 4WD | 15 | 19 | 16 | $4,870 |
| AMG GLS63 4matic Plus | 4.0L 8-cyl turbo | 4WD | 14 | 18 | 16 | $5,050 |
4 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2020 Mercedes-Benz GLS-Class MPG
18–21 MPG · $3,880–$4,430/yr
Hybrid configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo | 4WD | 19 | 23 | 21 | $3,880 |
| GLS580 4matic | 4.0L 8-cyl turbo | 4WD | 16 | 21 | 18 | $4,430 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the GLS450 4matic 3.0L 6-cyl turbo supercharged AWD: $4,630 in California and $3,370 in Texas, a $1,260 difference.
- California $4,630
- Washington $4,360
- New York $3,830
- Florida $3,550
- Texas $3,370
Similar cars
Closest combined MPG among MY2027 standard SUV models.
Generations
- 2017-2019
- 2020-2027* (X167)
Frequently asked questions
What gas mileage does the 2020-2027 Mercedes-Benz GLS-Class get?
EPA rates the 2020-2027 Mercedes-Benz GLS-Class at 15–21 MPG combined across 27 configurations and 8 model years. The most efficient version, the 2027 GLS450 4matic 3.0L 6-cyl turbo supercharged AWD, is rated 21 MPG (19 city, 24 highway).
Which years had the best MPG in the 2020-2027 Mercedes-Benz GLS-Class?
The GLS450 4matic 3.0L 6-cyl turbo supercharged AWD reached the generation's best combined rating, 21 MPG, in 2020, 2021, 2024, 2025, 2026 and 2027. The lowest top rating, 20 MPG, was in 2022 and 2023.
Did EPA ratings change during the 2020-2027 Mercedes-Benz GLS-Class?
Yes. Ratings changed in 2021, 2022, 2023, 2024, 2025, 2026 and 2027.
How does the 2020-2027 Mercedes-Benz GLS-Class compare with the previous generation?
The previous generation (2017-2019 Mercedes-Benz GLS-Class) is rated 14–19 MPG combined and costs $4,320–$5,570 a year to fuel; the 2020-2027 model is rated 15–21 MPG and costs $3,750–$5,350 a year.
How much does it cost to fuel a 2027 Mercedes-Benz GLS-Class per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the GLS450 4matic 3.0L 6-cyl turbo supercharged AWD costs about $3,880 a year. Across all 1 configuration the cost runs $3,880 a year.
How much does it cost to drive a 2027 Mercedes-Benz GLS-Class 100 miles?
About $25.87 per 100 miles for the GLS450 4matic 3.0L 6-cyl turbo supercharged AWD at premium gasoline $5.36/gal (U.S. average, Sep 2026). That is the annual cost over 15,000 miles divided by 150.
Is the 2027 Mercedes-Benz GLS-Class more efficient in the city or on the highway?
The GLS450 4matic 3.0L 6-cyl turbo supercharged AWD is rated 19 city and 24 highway MPG, so it is more efficient on the highway, by 5 MPG.
How does the 2027 Mercedes-Benz GLS-Class compare with other standard SUV configurations?
The GLS450 4matic 3.0L 6-cyl turbo supercharged AWD costs about $3,880 a year to fuel, $720 more than the class median of $3,160, and less than 3 of 10 standard SUV configurations. The comparison covers all 184 rated standard SUV configurations for MY2027, not weighted by sales.
Is the 2027 Mercedes-Benz GLS-Class different from the 2026 model?
The most efficient configuration stays at 21 MPG. Its annual cost goes from $3,860 to $3,880, $20 more. EPA lists 1 configuration for 2027 against 4 configurations for 2026. See the 2026 Mercedes-Benz GLS-Class for that year.