The Mercedes-GT S 63 E-Performance was the flagship variant of the Mercedes-AMG GT 4 Door that debuted for the 2019 model year and the first to be introduced under the E-Performance brand. The AMG GT63 E-Performance was powered by Mercedes-AMG's M177 4.0L Biturbo V8 engine which generated 630hp and 664lb ft of torque. This power train was supplemented by an electric motor that combined achieved a power output of 831hp and 1,033lb ft of torque. The 6.1 kWh battery pack with the electric motor can power the GT S 63 E-Performance for a range of 12 km at speeds of up to 81 mph.