Mercedes-Benz GLS-Class

Transmission, start-stop, premium fuel and flex-fuel by model year, 2017–2027

TransmissionThe 2027 Mercedes-Benz GLS-Class uses a 9-speed automatic in the configuration EPA tested.

Auto start-stopYes. The 2027 Mercedes-Benz GLS-Class has auto start-stop, according to EPA data.

Premium fuelEPA tested the 2027 Mercedes-Benz GLS-Class on premium fuel; your owner's manual or fuel-door label is the authority.

Flex-fuel (E85)No. EPA does not list any 2027 Mercedes-Benz GLS-Class configuration as a flex-fuel vehicle (FFV).

2027 at a glance

1 configuration tested by EPA

CVTNone

0 of 1

No CVT

ManualNone

0 of 1

Not offered

Auto start-stopAll

1 of 1

Premium fuelAll

1 of 1

EPA test fuel

Flex-fuel (E85)None

0 of 1

No FFV versions

EPA lists no manual transmission for any Mercedes-Benz GLS-Class from 2017–2027.

Mercedes-Benz GLS-Class features by model year

Which Mercedes-Benz GLS-Class model years have each feature. Each cell links to that year's configurations.
	’17	’18	’19	’20	’21	’22	’23	’24	’25	’26	’27
CVT	2017 CVT: None	2018 CVT: None	2019 CVT: None	2020 CVT: None	2021 CVT: None	2022 CVT: None	2023 CVT: None	2024 CVT: None	2025 CVT: None	2026 CVT: None	2027 CVT: None
Manual	2017 Manual: None	2018 Manual: None	2019 Manual: None	2020 Manual: None	2021 Manual: None	2022 Manual: None	2023 Manual: None	2024 Manual: None	2025 Manual: None	2026 Manual: None	2027 Manual: None
Automated manual	2017 Automated manual: None	2018 Automated manual: None	2019 Automated manual: None	2020 Automated manual: None	2021 Automated manual: None	2022 Automated manual: None	2023 Automated manual: None	2024 Automated manual: None	2025 Automated manual: None	2026 Automated manual: None	2027 Automated manual: None
Automatic	2017 Automatic: All	2018 Automatic: All	2019 Automatic: All	2020 Automatic: All	2021 Automatic: All	2022 Automatic: All	2023 Automatic: All	2024 Automatic: All	2025 Automatic: All	2026 Automatic: All	2027 Automatic: All
Start-stop	2017 Start-stop: All	2018 Start-stop: All	2019 Start-stop: Some	2020 Start-stop: All	2021 Start-stop: All	2022 Start-stop: All	2023 Start-stop: All	2024 Start-stop: All	2025 Start-stop: All	2026 Start-stop: All	2027 Start-stop: All
Premium fuel	2017 Premium fuel: All	2018 Premium fuel: All	2019 Premium fuel: All	2020 Premium fuel: All	2021 Premium fuel: All	2022 Premium fuel: All	2023 Premium fuel: All	2024 Premium fuel: All	2025 Premium fuel: All	2026 Premium fuel: All	2027 Premium fuel: All
Flex-fuel	2017 Flex-fuel: None	2018 Flex-fuel: None	2019 Flex-fuel: None	2020 Flex-fuel: None	2021 Flex-fuel: None	2022 Flex-fuel: None	2023 Flex-fuel: None	2024 Flex-fuel: None	2025 Flex-fuel: None	2026 Flex-fuel: None	2027 Flex-fuel: None

All configurationsSome configurationsNoneNot reported by EPA

Configurations by year

2027 Mercedes-Benz GLS-Class

1 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
GLS450 4matic	3.0L 6-cyl turbo supercharged hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No

2026 Mercedes-Benz GLS-Class

4 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
AMG GLS63 4matic Plus	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS450 4matic	3.0L 6-cyl turbo supercharged hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS580 4matic	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS600 4matic Maybach	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No

2025 Mercedes-Benz GLS-Class

4 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
AMG GLS63 4matic Plus	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS450 4matic	3.0L 6-cyl turbo supercharged hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS580 4matic	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS600 4matic Maybach	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No

2024 Mercedes-Benz GLS-Class

4 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
AMG GLS63 4matic Plus	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS450 4matic	3.0L 6-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS580 4matic	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS600 4matic Maybach	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No

2023 Mercedes-Benz GLS-Class

4 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
AMG GLS63 4matic Plus	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS450 4matic	3.0L 6-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS580 4matic	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS600 4matic Maybach	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No

2022 Mercedes-Benz GLS-Class

4 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
AMG GLS63 4matic Plus	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS450 4matic	3.0L 6-cyl turbo hybrid	9-speed automatic9-spd	4-Wheel	Yes	Premium	No
GLS580 4matic	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No
GLS600 4matic Maybach	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	All-Wheel	Yes	Premium	No

2021 Mercedes-Benz GLS-Class

4 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
AMG GLS63 4matic Plus	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	4-Wheel	Yes	Premium	No
GLS450 4matic	3.0L 6-cyl turbo hybrid	9-speed automatic9-spd	4-Wheel	Yes	Premium	No
GLS580 4matic	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	4-Wheel	Yes	Premium	No
GLS600 4matic Maybach	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	4-Wheel	Yes	Premium	No

2020 Mercedes-Benz GLS-Class

2 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
GLS450 4matic	3.0L 6-cyl turbo hybrid	9-speed automatic9-spd	4-Wheel	Yes	Premium	No
GLS580 4matic	4.0L 8-cyl turbo hybrid	9-speed automatic9-spd	4-Wheel	Yes	Premium	No

2019 Mercedes-Benz GLS-Class

3 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
AMG GLS63	5.5L 8-cyl turbo	7-speed automatic7-spd	4-Wheel	No	Premium	No
GLS450 4matic	3.0L 6-cyl turbo	9-speed automatic9-spd	4-Wheel	Yes	Premium	No
GLS550 4matic	4.7L 8-cyl turbo	9-speed automatic9-spd	4-Wheel	Yes	Premium	No

2018 Mercedes-Benz GLS-Class

3 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
AMG GLS63	5.5L 8-cyl turbo	7-speed automatic7-spd	4-Wheel	Yes	Premium	No
GLS450 4matic	3.0L 6-cyl turbo	9-speed automatic9-spd	4-Wheel	Yes	Premium	No
GLS550 4matic	4.7L 8-cyl turbo	9-speed automatic9-spd	4-Wheel	Yes	Premium	No

2017 Mercedes-Benz GLS-Class

3 configurations

EPA model name	Engine	Transmission	Drive	Start-stop	EPA test fuel	Flex-fuel
AMG GLS63	5.5L 8-cyl turbo	7-speed automatic7-spd	4-Wheel	Yes	Premium	No
GLS450 4matic	3.0L 6-cyl turbo	9-speed automatic9-spd	4-Wheel	Yes	Premium	No
GLS550 4matic	4.7L 8-cyl turbo	9-speed automatic9-spd	4-Wheel	Yes	Premium	No

Check before you buy or refuel Confirm on the window sticker, owner's manual or with the dealer. Trims and options can differ from the configurations EPA tested.

About premium fuel EPA data shows the fuel a vehicle was tested on. It does not say whether premium is required or only recommended. Your owner's manual or fuel-door label is the authority.

Before using E85 Confirm the vehicle is a flex-fuel vehicle (FFV) in the owner's manual, or look for a yellow gas cap or an "FFV" badge. Not every version of a model is flex-fuel.

Source: U.S. EPA / Department of Energy vehicle data fromFuelEconomy.gov, data as of September 29, 2026.See how we classify vehicles.

Mercedes-Benz GLS-Class

2027 at a glance

Mercedes-Benz GLS-Class features by model year

Configurations by year

2027 Mercedes-Benz GLS-Class

2026 Mercedes-Benz GLS-Class

2025 Mercedes-Benz GLS-Class

2024 Mercedes-Benz GLS-Class

2023 Mercedes-Benz GLS-Class

2022 Mercedes-Benz GLS-Class

2021 Mercedes-Benz GLS-Class

2020 Mercedes-Benz GLS-Class

2019 Mercedes-Benz GLS-Class

2018 Mercedes-Benz GLS-Class

2017 Mercedes-Benz GLS-Class

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