Displacement: 2,999 cc
The 2026 GLS 450 is powered by a 3.0-liter turbocharged inline-six engine (M256). This powertrain is integrated with a 48-volt Integrated Starter-Generator (ISG) that provides an additional electric boost of 20 bhp and 200 Nm for smoother acceleration and enhanced fuel efficiency through energy recuperation.
Max Power: 375 bhp
The engine delivers 375 bhp between 5,500 and 6,100 rpm. The mild-hybrid system assists during the engine's "coasting" phase and provides an instantaneous torque fill to eliminate turbo lag, ensuring a linear power delivery typical of a flagship luxury SUV.
Max Torque: 500 Nm
Peak torque of 500 Nm is available from 1,600 to 4,500 rpm. This low-end grunt is essential for the GLS's towing capacity and off-road capability, allowing the vehicle to move its substantial mass with ease on varied terrains.
Gearbox Type: 9G-TRONIC (9-Speed Automatic)
The 9G-TRONIC automatic transmission provides a wide ratio spread that keeps the engine in its optimal efficiency range. It features steering-wheel-mounted shift paddles and a dedicated "Off-Road" mode that optimizes shift points for low-traction surfaces.
0-100 km/h Time: 6.1 Seconds
Despite its size, the GLS 450 4MATIC is impressively quick, reaching 100 km/h from a standstill in just 6.1 seconds. This is achieved through the combined effort of the turbocharged engine and the instantaneous torque of the electric motor.
