The 2026 Mercedes-Benz GLS SUV turns every press of the accelerator into an expression of athleticism, with powertrains built for everything from leisurely cruising to spirited driving. Each engine combines hybrid-assist technology for enhanced torque delivery and considerable towing ability to support your active lifestyle. In this overview from Autohaus on Edens, take a closer look at the available 2026 Mercedes-Benz GLS SUV engines to get an idea of their driving characteristics and see which best suits your preferences.
Search our new inventory to discover a 2026 Mercedes-Benz GLS SUV in your preferred trim and engine combination. For a test drive, schedule an appointment or stop by our dealership in Northbrook, IL, during business hours. We’re available online and by phone at (847) 272-7900 if you have any questions.
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The available 2026 Mercedes-Benz GLS SUV engines range from a single-turbo inline six-cylinder (I6) to two biturbo V8 engines, including a handcrafted AMG® configuration. An integrated 48-volt hybrid starter-generator accompanies each engine with an additional burst of electrically generated power for a more immediate throttle response. Drivetrain and performance components further distinguish the three options.
View the following 2026 Mercedes-Benz GLS SUV engine specifications:
| Engine | 3.0L I6 turbo with mild hybrid drive | 4.0L V8 biturbo with mild hybrid drive | Handcrafted AMG® 4.0L V8 biturbo with hybrid assist |
|---|---|---|---|
| Horsepower | 375 HP | 510 HP | 603 HP |
| Torque | 369 lb.-ft. | 538 lb.-ft. | 627 lb.-ft. |
| Drivetrain | 4MATIC® fully variable AWD | 4MATIC® fully variable AWD | AMG® Performance 4MATIC® AWD |
| Transmission | 9G-TRONIC nine-speed automatic | 9G-TRONIC nine-speed automatic | AMG® SPEEDSHIFT® TCT nine-speed automatic |
| MPG (City/Hwy) | 19 / 24 | 14 / 20 | 15 / 20 |
| Max. Towing Capacity | 7,700 lbs. | 7,700 lbs. | 7,700 lbs. |
The 3.0L I6 turbo engine with mild hybrid drive combines versatile performance with systems suited to changing roads and travel plans. DYNAMIC SELECT lets you alter vehicle behavior through ECO, comfort, sport, off-road, and individual modes, while 4MATIC® all-wheel drive (AWD) distributes power across all four wheels. Beneath you, AIRMATIC® suspension with the Adaptive Damping System continually adjusts damping to the driving situation.
A more muscular character emerges from the 4.0L V8 biturbo engine with mild hybrid drive. Its power is routed through the 4MATIC® fully variable AWD system, providing torque to the front or rear wheels, or both, as needed for optimal traction. A sport brake system accompanies this V8 engine, adding refined braking hardware suited to its elevated performance.
Built for excitement, the handcrafted AMG® 4.0L V8 biturbo engine combines hybrid assist with specialized systems to generate a thrilling 603 horsepower. An AMG® electronic limited-slip rear differential varies power distribution between the rear wheels, helping to balance output and stability during acceleration and cornering, while AMG® ACTIVE RIDE CONTROL limits body movement for sharper handling. An AMG® Performance active-valve exhaust system lets you tailor the stirring rumble of the V8 engine.
When your plans call for hauling cargo beyond the passenger cabin, the 2026 Mercedes-Benz GLS SUV offers a maximum towing capacity of 7,700 pounds when properly equipped. A Class IV trailer hitch with a wiring harness and trailer stability assist provides the equipment needed to take advantage of that capability, which is included on the 2026 Mercedes-AMG® trim and available as an option on the 2026 Mercedes-Benz models.
Your choice of 2026 Mercedes-Benz GLS SUV trim determines which of the three engines is under the hood. Hybrid assist technology, included with each powertrain, helps ensure peak performance and efficiency across the lineup.
With its commanding performance, versatile capability, and thoughtful craftsmanship, the 2026 Mercedes-Benz GLS SUV is designed to make everyday travel and spontaneous escapes feel sophisticated. Learn more about the trims, features, interior, and other highlights of this luxurious three-row SUV with our additional guides.
View our new inventory to find an SUV that you would like to experience in person. Reserve your test drive with an appointment or stop by our Mercedes-Benz dealership in Northbrook to spend time behind the wheel. Connect with our team online or by phone at (847) 272-7900 if you have any questions.
*Stated rates of acceleration are based upon manufacturer’s track results and may vary depending on model, environmental and road surface conditions, driving style, elevation, and vehicle load.
