- Newest year: 2019
- Gas
- Standard SUVs
2017-2019 Mercedes-Benz GLS-Class MPG & Fuel Cost
3 model years · 14–19 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, MY2019. Ranked against all rated configurations, not sales-weighted.
2017-2019 Mercedes-Benz GLS-Class at a glance
The 2017-2019 Mercedes-Benz GLS-Class covers 3 model years in the EPA database (9 configurations in all), rated 14–19 MPG combined. The newest model year, 2019, costs about $4,410 a year to fuel for its most efficient version, the GLS450 4matic 3.0L 6-cyl turbo 4WD (18 MPG), at premium gasoline $5.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2018 and 2019. The best combined rating in the generation, 19 MPG, was reached in 2017 and 2018.
2017-2019 Mercedes-Benz GLS-Class by model year
What the 2019 GLS450 4matic 3.0L 6-cyl turbo 4WD costs to drive
Per month
$368
$4,410 a year ÷ 12
Per 25 miles
$7.35
Per 100 miles
$29.40
Five years
$22,050
5 × the yearly cost, prices held at today's level
vs the standard SUV median
$640more a year
Class median $3,770 a year, MY2019
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2019 Mercedes-Benz GLS-Class MPG
Versus 2018: The most efficient configuration moves from 19 to 18 MPG, down 1. Its annual cost goes from $4,320 to $4,410, $90 more.
Gas configurations (3)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo | 4WD | 16 | 22 | 18 | $4,410 |
| GLS550 4matic | 4.7L 8-cyl turbo | 4WD | 14 | 19 | 16 | $5,160 |
| AMG GLS63 | 5.5L 8-cyl turbo | 4WD | 13 | 18 | 15 | $5,430 |
3 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2018 Mercedes-Benz GLS-Class MPG
15–19 MPG · $4,320–$5,360/yr
Versus 2017: The most efficient configuration stays at 19 MPG. Its annual cost stays at $4,320.
Gas configurations (3)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo | 4WD | 17 | 22 | 19 | $4,320 |
| GLS550 4matic | 4.7L 8-cyl turbo | 4WD | 14 | 19 | 16 | $5,040 |
| AMG GLS63 | 5.5L 8-cyl turbo | 4WD | 13 | 18 | 15 | $5,360 |
3 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2017 Mercedes-Benz GLS-Class MPG
14–19 MPG · $4,320–$5,570/yr
Gas configurations (3)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLS450 4matic (Most efficient) | 3.0L 6-cyl turbo | 4WD | 17 | 22 | 19 | $4,320 |
| GLS550 4matic | 4.7L 8-cyl turbo | 4WD | 14 | 18 | 16 | $5,110 |
| AMG GLS63 | 5.5L 8-cyl turbo | 4WD | 13 | 17 | 14 | $5,570 |
3 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 4WD: $5,260 in California and $3,830 in Texas, a $1,430 difference.
- California $5,260
- Washington $4,950
- New York $4,360
- Florida $4,030
- Texas $3,830
Similar cars
Closest combined MPG among MY2019 standard SUV models.
Generations
- 2017-2019
- 2020-2027* (X167)
Frequently asked questions
What gas mileage does the 2017-2019 Mercedes-Benz GLS-Class get?
EPA rates the 2017-2019 Mercedes-Benz GLS-Class at 14–19 MPG combined across 9 configurations and 3 model years. The most efficient version, the 2018 GLS450 4matic 3.0L 6-cyl turbo 4WD, is rated 19 MPG (17 city, 22 highway).
Which years had the best MPG in the 2017-2019 Mercedes-Benz GLS-Class?
The GLS450 4matic 3.0L 6-cyl turbo 4WD reached the generation's best combined rating, 19 MPG, in 2017 and 2018. The lowest top rating, 18 MPG, was in 2019.
Did EPA ratings change during the 2017-2019 Mercedes-Benz GLS-Class?
Yes. Ratings changed in 2018 and 2019.
How much does it cost to fuel a 2019 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 4WD costs about $4,410 a year. Across all 3 configurations the cost runs $4,410–$5,430 a year. That is a $1,020 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2019 Mercedes-Benz GLS-Class 100 miles?
About $29.40 per 100 miles for the GLS450 4matic 3.0L 6-cyl turbo 4WD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $29.40 and $36.20 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2019 Mercedes-Benz GLS-Class more efficient in the city or on the highway?
The GLS450 4matic 3.0L 6-cyl turbo 4WD is rated 16 city and 22 highway MPG, so it is more efficient on the highway, by 6 MPG.
How does the 2019 Mercedes-Benz GLS-Class compare with other standard SUV configurations?
The GLS450 4matic 3.0L 6-cyl turbo 4WD costs about $4,410 a year to fuel, $640 more than the class median of $3,770, and less than 3 of 10 standard SUV configurations. The comparison covers all 151 rated standard SUV configurations for MY2019, not weighted by sales.
Is the 2019 Mercedes-Benz GLS-Class different from the 2018 model?
The most efficient configuration moves from 19 to 18 MPG, down 1. Its annual cost goes from $4,320 to $4,410, $90 more. EPA lists 3 configurations for 2019 against 3 configurations for 2018. See the 2018 Mercedes-Benz GLS-Class for that year.