[7][8] Despite the name and style, the GT 4-Door Coupé is closely related to the E 63 AMG with its performance chassis, and is featured by the AMG-specific rear frame and a different front axle for better kinematics.

[13][14] The car utilises the rear anti-roll bar to increase chassis stiffness, as well as active aero, including an electronically adjustable rear spoiler and electronically operated front louvers in the front grille, that can open and close to manage airflow through the radiator from the AMG GT R flagship sports car.

The starter-generator and electrically driven supercharger called EQ boost supplements the engine temporarily with 16 kW (21 hp) and 250 N⋅m (184 lbf⋅ft) of torque while under full acceleration.

[24] The car comes standard with an electronically controlled limited-slip rear differential and rear-wheel steering, and features an MCT gearbox with a wet clutch to handle the extra power.

The GT 63 uses AMG's multi-chamber air suspension for a sportier, more adaptive ride and has cylinder deactivation mode for increased efficiency.

It features the same 4.0L M177 Biturbo V8 engine, with the same electric motor powertrain as the Mercedes-Benz AMG GT Concept.

[27] As for the PHEV system, the 6.1 kWh battery pack with the electric motor can commit to a pure EV range of 12 km at speeds of up to 130 km/h (81 mph).