The Mercedes-Benz GLS 450 gas mileage is 19 to 22 miles per gallon as specified in our data below, organized by trim, option package, and model year.
For example, the 2019 Mercedes-Benz GLS 450 trim model has a combined gas mileage of 19 miles per gallon, while the 2025 Mercedes-Benz GLS 450 4MATIC has a combined gas mileage of 22 miles per gallon.
In the city, the GLS 450 gas mileage is 16 to 19 miles per gallon depending on the trim and model year.
On the highway, the GLS 450 gas mileage is 22 to 24 miles per gallon depending on the trim and model year.
Note: The gas mileage shown for hybrid vehicles is the miles per gallon equivalent.
Check out the Gas Mileage specifications for other makes and models.
2025 Mercedes-Benz GLS 450 Gas Mileage
The 2025 Mercedes-Benz GLS 450 gas mileage is 22 miles per gallon combined.
In the city, the 2025 GLS 450 gas mileage is 19 miles per gallon.
On the highway, the 2025 GLS 450 gas mileage is 24 miles per gallon.
2025 Mercedes-Benz GLS 450 Gas Mileage (Imperial)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| 4MATIC Hybrid |
3.0L | Turbo | 6 Cyl. | Hybrid | 9 Spd Auto w/OD | AWD |
19 city mpg | 24 hwy mpg | 22 combined mpg |
2025 Mercedes-Benz GLS 450 Gas Mileage (Metric)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| 4MATIC Hybrid |
3.0L | Turbo | 6 Cyl. | Hybrid | 9 Spd Auto w/OD | AWD |
12.4 city L/100 km | 9.8 hwy L/100 km | 10.7 combined L/100 km |
2020 Mercedes-Benz GLS 450 Gas Mileage
The 2020 Mercedes-Benz GLS 450 gas mileage is 21 miles per gallon combined.
In the city, the 2020 GLS 450 gas mileage is 19 miles per gallon.
On the highway, the 2020 GLS 450 gas mileage is 23 miles per gallon.
2020 Mercedes-Benz GLS 450 Gas Mileage (Imperial)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| SUV |
3.0L | Intercooled Turbo | I6 | 9 Spd Auto w/OD | AWD |
19 city mpg | 23 hwy mpg | 21 combined mpg |
| GLS 450 4MATIC SUV |
3.0L | Intercooled Turbo | I6 | 9 Spd Auto w/OD | AWD |
19 city mpg | 23 hwy mpg | 21 combined mpg |
2020 Mercedes-Benz GLS 450 Gas Mileage (Metric)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| SUV |
3.0L | Intercooled Turbo | I6 | 9 Spd Auto w/OD | AWD |
12.0 city L/100 km | 10.0 hwy L/100 km | 11.0 combined L/100 km |
| GLS 450 4MATIC SUV |
3.0L | Intercooled Turbo | I6 | 9 Spd Auto w/OD | AWD |
12.0 city L/100 km | 10.0 hwy L/100 km | 11.0 combined L/100 km |
2019 Mercedes-Benz GLS 450 Gas Mileage
The 2019 Mercedes-Benz GLS 450 gas mileage is 19 miles per gallon combined.
In the city, the 2019 GLS 450 gas mileage is 16 miles per gallon.
On the highway, the 2019 GLS 450 gas mileage is 22 miles per gallon.
2019 Mercedes-Benz GLS 450 Gas Mileage (Imperial)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| SUV |
3.0L | Twin Turbo | V6 | 9 Spd Auto w/OD | AWD |
16 city mpg | 22 hwy mpg | 19 combined mpg |
| GLS 450 4MATIC SUV |
3.0L | Twin Turbo | V6 | 9 Spd Auto w/OD | AWD |
16 city mpg | 22 hwy mpg | 19 combined mpg |
2019 Mercedes-Benz GLS 450 Gas Mileage (Metric)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| SUV |
3.0L | Twin Turbo | V6 | 9 Spd Auto w/OD | AWD |
15.0 city L/100 km | 11.0 hwy L/100 km | 12.0 combined L/100 km |
| GLS 450 4MATIC SUV |
3.0L | Twin Turbo | V6 | 9 Spd Auto w/OD | AWD |
15.0 city L/100 km | 11.0 hwy L/100 km | 12.0 combined L/100 km |
2018 Mercedes-Benz GLS 450 Gas Mileage
The 2018 Mercedes-Benz GLS 450 gas mileage is 19.5 miles per gallon combined.
In the city, the 2018 GLS 450 gas mileage is 17 miles per gallon.
On the highway, the 2018 GLS 450 gas mileage is 22 miles per gallon.
2018 Mercedes-Benz GLS 450 Gas Mileage (Imperial)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| SUV |
3.0L | Twin Turbo | V6 | 9 Spd Auto w/OD | AWD |
17 city mpg | 22 hwy mpg | 19.5 combined mpg |
2018 Mercedes-Benz GLS 450 Gas Mileage (Metric)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| SUV |
3.0L | Twin Turbo | V6 | 9 Spd Auto w/OD | AWD |
14.0 city L/100 km | 11.0 hwy L/100 km | 12.0 combined L/100 km |
2017 Mercedes-Benz GLS 450 Gas Mileage
The 2017 Mercedes-Benz GLS 450 gas mileage is 20.5 miles per gallon combined.
In the city, the 2017 GLS 450 gas mileage is 19 miles per gallon.
On the highway, the 2017 GLS 450 gas mileage is 22 miles per gallon.
2017 Mercedes-Benz GLS 450 Gas Mileage (Imperial)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| SUV |
3.0L | Twin Turbo | V6 | 9 Spd Auto w/OD | AWD |
19 city mpg | 22 hwy mpg | 20.5 combined mpg |
2017 Mercedes-Benz GLS 450 Gas Mileage (Metric)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| SUV |
3.0L | Twin Turbo | V6 | 9 Spd Auto w/OD | AWD |
12.0 city L/100 km | 11.0 hwy L/100 km | 11.0 combined L/100 km |
Mercedes-Benz GLS 450 Gas Mileage Data Brought To You By AutoPadre