Mercedes-Benz has unveiled four new engines set to hit the streets in the facelifted 2017 S-Class. All four engines are based around a modular architecture of 500 cc per cylinder and have been designed to provide better performance while increasing fuel economy and cutting emissions.

Perhaps the two most exciting engines are the new inline-six cylinder petrol and diesel units. For the petrol, dubbed the M256, the engine comes alongside a 48V electrical system which powers components like the Integrated Starter-Alternator, water pump and air-conditioning compressor. Additionally, it includes an electric auxiliary compressor to eliminate turbo lag.


Mercedes-Benz says it will be able to deliver over 408 hp and 500 Nm of torque, figures similar to the brand's current V8.

As for the diesel-powered inline-six, it incorporates variable valve timing and uses an aluminum engine block as well as steel pistons with a Nanoslide coating on the cylinder walls. Compared to the brand's outgoing diesel, this new one produces 313 hp instead of 258 hp yet consumes seven per cent less fuel.


The 2017 S-Class will also receive a new twin-turbocharged 4.0-liter V8 producing over 476 hp and 700 Nm of torque from just 2,000 rpm. Codenamed M176, it replaces the 449 hp M278 V8 and features cylinder deactivation which can effectively turn it into a four-cylinder.

Last, is a new 2.0-liter four-cylinder with about 134 hp per liter. It utilizes twin-scroll turbochargers and is also joined with a belt-driven 48V starter-alternator which aids in improving fuel efficiency.