The 3.0-litre straight-six petrol engine uses a 48-volt electrical system to add an extra 22bhp and 250Nm of torque, as well as helping to reduce fuel consumption by powering electrical systems so the engine can be switched off for longer.
The German company initially unveiled the new powerplant in the E-Class Coupe and CLS models, before announcing that it would be used in the new GT 4-Door.
In the E-Class, the new ’53’ engine produces 429bhp, plus the 22bhp electrical assistance, allowing a 0-62mph time of 4.5 seconds. And with the hybrid system on board, the ’53’ will return 32.5mpg and 200g/km CO2 emissions.
The ’53’, which replaces the V6-powered ’43’, will be set apart by its 19-inch alloy wheels and AMG performance exhaust. AMG air suspension and a driving mode selector will also be included, allowing the driver to tune the car to the conditions and driving style.
Inside, meanwhile, the newcomer will benefit from leather seats with red contrast stitching, satellite navigation and a widescreen cockpit display comprising two 12.3-inch screens. Wireless phone charging and a 360-degree parking camera will also feature.
The new variants are already on sale, with prices starting from £61,835 for the Saloon and £63,835 for the Estate. The first right-hand-drive cars are expected to arrive in the UK in July.