The 2017 Mercedes S-Class is going to be getting all-new Mercedes engines including a 48v electrical system. When the facelifted version of the S-Class arrives in the new year, the new batch of engines will be available in them – after that, they will make their way through Mercedes’ entire range.

The 48-volt electrical system will allow the car to power a water pump, climate control and a starter-generator. Four times the power with the same current brings weight savings to the car, and also means that the power-hungry features of the car no longer drain energy from the engine.

Two of the new engines will be a twin-turbocharged 4.0-litre V8 and a twin-turbo six-cylinder motor. The six-cylinder engine, which is called M 256, is due a few months after the S-Class’s debut next June. The M 256 will bring the 48V electrics to power the 20bhp integrated starter generator (ISG) along with the water pump and climate control system.

Mercedes says it will offer more than 402bhp and 500Nm of torque – figures that match the current V8 engine – but emit 15 per cent less CO2 than the old V6.

A new 2.0-litre four-cylinder turbocharged petrol engine (M 264) will also come with the 48v technology, a straight-six unit called OM 656 that produces 308bhp, and a new 2.0-litre four-cylinder diesel should also be available in the S-Class.

We’ll have more details about the facelifted S-Class and these news engines as they become available.