2020 Mercedes-Benz GLS-Class
US · SUV · Standard Sport Utility Vehicle 4WD
The 2020 Mercedes-Benz GLS-Class is listed in the US market as a suv with hybrid power. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.
- Engine
- Varies by configuration: 3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid), 4.0L 8-cylinder turbocharged (SIDI; Mild Hybrid)
- Transmission
- 9-speed automatic
- Drivetrain
- 4WD
- Fuel
- Hybrid
- Economy
- 18 mpg (13.1 L/100 km) to 21 mpg (11.2 L/100 km) combined
Key Figures
Engine
| Specification | Value | Source |
|---|---|---|
| Engine | Varies by configuration: 3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid), 4.0L 8-cylinder turbocharged (SIDI; Mild Hybrid) | |
| Displacement | 3.0 L to 4.0 L | |
| Cylinders | 6 to 8 | |
| Aspiration | Turbocharged | |
| Fuel type | Hybrid | EPA fueleconomy.gov |
Transmission and drivetrain
| Specification | Value | Source |
|---|---|---|
| Transmission | Automatic | EPA fueleconomy.gov |
| Gears | 9 | |
| Drivetrain | 4WD | EPA fueleconomy.gov |
Fuel economy and range
| Specification | Value | Source |
|---|---|---|
| Combined | 18 mpg (13.1 L/100 km) to 21 mpg (11.2 L/100 km) | EPA fueleconomy.gov |
| City | 16 mpg (14.7 L/100 km) to 19 mpg (12.4 L/100 km) | |
| Highway | 21 mpg (11.2 L/100 km) to 23 mpg (10.2 L/100 km) |
Our sources do not publish these for this vehicle: Power, Torque, Electric range, Battery capacity. We leave them out instead of estimating.
Trims and configurations
2 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.
Recalls
No recall campaigns were found in NHTSA data at the last check. Last checked November 9, 2026.
Data sources
- EPA fueleconomy.gov · retrieved November 4, 2026 · US Government public data
- NHTSA vPIC · retrieved October 12, 2026 · US Government public data
Source checked: November 4, 2026
Data verified: November 4, 2026
Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.
Compare
Related vehicles
- 2019 Mercedes-Benz GLS-Class
SUV, Gasoline
Varies by configuration: 3.0L 6-cylinder turbocharged (SIDI), 4.7L 8-cylinder turbocharged (SIDI), 5.5L 8-cylinder turbocharged (SIDI) · 4WD
18 mpg (13.1 L/100 km) to 15 mpg (15.7 L/100 km) - 2021 Mercedes-Benz GLS-Class
SUV, Hybrid
Varies by configuration: 4.0L 8-cylinder turbocharged (SIDI; Mild Hybrid), 3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid) · 4WD
21 mpg (11.2 L/100 km) to 16 mpg (14.7 L/100 km) - 2020 Mercedes-Benz GLE-Class
SUV, Varies by configuration: Gasoline, Hybrid
Varies by configuration: 2.0L 4-cylinder turbocharged (SIDI), 3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid), 4.0L 8-cylinder turbocharged (SIDI; Mild Hybrid) · Varies by configuration: 4WD, RWD
22 mpg (10.7 L/100 km) to 19 mpg (12.4 L/100 km) - 2020 Mercedes-Benz GLB-Class
SUV, Gasoline
2.0L 4-cylinder turbocharged (SIDI) · Varies by configuration: FWD, 4WD
26 mpg (9.0 L/100 km) - 2020 Mercedes-Benz GLA-Class
SUV, Gasoline
2.0L 4-cylinder turbocharged (SIDI) · Varies by configuration: FWD, 4WD
28 mpg (8.4 L/100 km) to 25 mpg (9.4 L/100 km) - 2020 Audi RS Q8
SUV, Hybrid
4.0L 8-cylinder turbocharged (SIDI; Mild Hybrid) · 591 hp (441 kW) · AWD
15 mpg (15.7 L/100 km) 
2020 Toyota RAV4SUV, Varies by configuration: Gasoline, Hybrid
Varies by configuration: 2.5L 4-cylinder (SIDI & PFI), 2.5L 4-cylinder (SIDI & PFI; Stop-Start), 2.5L 4-cylinder (SIDI & PFI; Hybrid) · 219 hp (163 kW) · Varies by configuration: FWD, AWD
40 mpg (5.9 L/100 km) to 27 mpg (8.7 L/100 km)
2020 Lexus RXSUV, Varies by configuration: Gasoline, Hybrid
Varies by configuration: 3.5L 6-cylinder (SIDI & PFI), 3.5L 6-cylinder (SIDI & PFI; Hybrid) · 245 hp (183 kW) · Varies by configuration: FWD, AWD
30 mpg (7.8 L/100 km) to 21 mpg (11.2 L/100 km)
Explore similar vehicles
Frequently asked questions
What engine does the 2020 Mercedes-Benz GLS-Class have?
Varies by configuration: 3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid), 4.0L 8-cylinder turbocharged (SIDI; Mild Hybrid). Engines can differ by trim, so check the trim list below.
What is the fuel economy of the 2020 Mercedes-Benz GLS-Class?
Combined fuel economy is 18 mpg (13.1 L/100 km) to 21 mpg (11.2 L/100 km), as published by the source shown in the specification table.
Is the 2020 Mercedes-Benz GLS-Class front-wheel, rear-wheel or all-wheel drive?
Drivetrain: 4WD.
Are there recalls for the 2020 Mercedes-Benz GLS-Class?
No recall campaigns were found in NHTSA data when we last checked on November 9, 2026. Recall status can change, so confirm with NHTSA or the manufacturer.