The diesel models adopt Mercedes’ latest OM654-designated engine. It develops 148bhp in the C200d, 192bhp in the C220d and 241bhp in the 300d, figures that represent increases of 13bhp, 24bhp and 40bhp over today’s models respectively.
The petrol models feature Mercedes’ new M264 engine. In the new C200 EQ Boost, it develops an additional 7bhp over the old M274 engine, taking nominal reserves up to 188bhp. Additionally, it adopts a belt-driven alternator and 48V electric architecture that adds 17bhp for brief periods of electric boosting.
The evolution of the M264 engine in the new C300 doesn’t use the hybrid functions of the C200 EQ Boost, but runs a higher state of tune with added turbo boost pressure. Power is up by 13bhp over today’s version of the C300, giving the updated model 255bhp.
Autocar can also confirm plans for new petrol-electric C400 and diesel-electric C400d EQ Power hybrid models featuring plug-in capability and a pure electric driving range of up to 31 miles. Mercedes insiders reveal the advanced new C-Class models get updated electric motors featuring a 41bhp increase on the unit used by the existing C350e at 121bhp, together with new charging systems for faster charging times.
Despite the appearance of a new turbocharged 2.9-litre in-line six-cylinder petrol in the new Mercedes-AMG E53 and CLS53 models, the facelifted C43 will retain the same turbocharged 3.0-litre V6 petrol unit used by today’s model, albeit with a mild increase in power.
At the top of the line-up, the Mercedes-AMG C63 will also receive an updated version of the 4.0-litre V8 engine in use in the existing model, with new twin-scroll turbochargers.
The new engines will be mated to a standard six-speed manual or new nine-speed torque converter-equipped automatic gearbox – the latter of which replaces the seven- speed automatic offered on today’s C-Class.