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Mercedes-Benz GLS 450 Gas Tank Size (2017-2027)

Researched By The AutoPadre Research Team

Last Updated 2026-09-02

The Mercedes-Benz GLS 450 gas tank sizes range from 23.8 gallons to 26.4 gallons as specified in our data below, organized by trim, option package, and model year.

The gas tank size of the Mercedes-Benz GLS 450, when combined with its fuel mileage, gives the GLS 450 the following ranges depending on the model year and options:

City range from 422 miles to 501 miles
Highway range from 547 miles to 580 miles

Check out the Gas Tank Size specifications for other makes and models.

2027 Mercedes-Benz GLS 450 Gas Tank Size

The 2027 Mercedes-Benz GLS 450 gas tank size is 23.8 gallons.

On a full tank of fuel, the 2027 Mercedes-Benz GLS 450 has the following ranges:

City range of 452 miles
Highway range of 571 miles

2027 Mercedes-Benz GLS 450 Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
4MATIC SUV	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 9 Spd Auto w/OD \| AWD	23.8 gal.	452 city \| 571 hwy \| 500 combined

2027 Mercedes-Benz GLS 450 Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
4MATIC SUV	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 9 Spd Auto w/OD \| AWD	90.1 liters	727 city \| 919 hwy \| 805 combined

2026 Mercedes-Benz GLS 450 Gas Tank Size

The 2026 Mercedes-Benz GLS 450 gas tank size is 23.8 gallons.

On a full tank of fuel, the 2026 Mercedes-Benz GLS 450 has the following ranges:

City range of 452 miles
Highway range of 571 miles

2026 Mercedes-Benz GLS 450 Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
4MATIC SUV	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 9 Spd Auto w/OD \| AWD	23.8 gal.	452 city \| 571 hwy \| 500 combined

2026 Mercedes-Benz GLS 450 Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
4MATIC SUV	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 9 Spd Auto w/OD \| AWD	90.1 liters	727 city \| 919 hwy \| 805 combined

2025 Mercedes-Benz GLS 450 Gas Tank Size

The 2025 Mercedes-Benz GLS 450 gas tank size is 23.8 gallons.

On a full tank of fuel, the 2025 Mercedes-Benz GLS 450 has the following ranges:

City range of 452 miles
Highway range of 571 miles

2025 Mercedes-Benz GLS 450 Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
4MATIC Hybrid	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 9 Spd Auto w/OD \| AWD	23.8 gal.	452 city \| 571 hwy \| 524 combined

2025 Mercedes-Benz GLS 450 Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
4MATIC Hybrid	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 9 Spd Auto w/OD \| AWD	90.1 liters	727 city \| 919 hwy \| 843 combined

2020 Mercedes-Benz GLS 450 Gas Tank Size

The 2020 Mercedes-Benz GLS 450 gas tank size is 23.8 gallons.

On a full tank of fuel, the 2020 Mercedes-Benz GLS 450 has the following ranges:

City range of 452 miles
Highway range of 547 miles

2020 Mercedes-Benz GLS 450 Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
GLS 450 4MATIC SUV	3.0L \| Intercooled Turbo \| I6 \| 9 Spd Auto w/OD \| AWD	23.8 gal.	452 city \| 547 hwy \| 499 combined
Base SUV	3.0L \| Intercooled Turbo \| I6 \| 9 Spd Auto w/OD \| AWD	23.8 gal.	452 city \| 547 hwy \| 499 combined

2020 Mercedes-Benz GLS 450 Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
GLS 450 4MATIC SUV	3.0L \| Intercooled Turbo \| I6 \| 9 Spd Auto w/OD \| AWD	90.1 liters	727 city \| 880 hwy \| 803 combined
Base SUV	3.0L \| Intercooled Turbo \| I6 \| 9 Spd Auto w/OD \| AWD	90.1 liters	727 city \| 880 hwy \| 803 combined

2019 Mercedes-Benz GLS 450 Gas Tank Size

The 2019 Mercedes-Benz GLS 450 gas tank size is 26.4 gallons.

On a full tank of fuel, the 2019 Mercedes-Benz GLS 450 has the following ranges:

City range of 422 miles
Highway range of 580 miles

2019 Mercedes-Benz GLS 450 Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
GLS 450 4MATIC SUV	3.0L \| Twin Turbo \| V6 \| 9 Spd Auto w/OD \| AWD	26.4 gal.	422 city \| 580 hwy \| 501 combined
Base SUV	3.0L \| Twin Turbo \| V6 \| 9 Spd Auto w/OD \| AWD	26.4 gal.	422 city \| 580 hwy \| 501 combined

2019 Mercedes-Benz GLS 450 Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
GLS 450 4MATIC SUV	3.0L \| Twin Turbo \| V6 \| 9 Spd Auto w/OD \| AWD	99.9 liters	679 city \| 933 hwy \| 806 combined
Base SUV	3.0L \| Twin Turbo \| V6 \| 9 Spd Auto w/OD \| AWD	99.9 liters	679 city \| 933 hwy \| 806 combined