Mercedes-Benz have unveiled the first details of the next generation engines at a Mercedes-Benz TecDay event. These engines, no matter how impressive they may sound, are not concepts, and will make debuts in production cars in 2017.

There’s love for both petrol and diesel engines from Mercedes-Benz, ranging from four-cylinder motors all the way to big V8s, although the latter does see some further shrinkage in terms of displacement. All engines are built around the 500cc per cylinder displacement concept so you have 2.0, 3.0 and 4.0 litre engines.

New M256 inline-six petrol engine

The rumours are true – Mercedes-Benz has abandoned the V6 in favour for the inline-6 configuration. But the inline-six layout isn’t all that’s new for the 3.0 litre M256 petrol engine.

The engine uses a 48V electrical system, which allows the entire ancillary system to be overhauled. For example, there is no longer any belt drive in front of the engine to power stuff like the water pump or aircond compressor – these are all electric items that are powered by the 48V system now, so they can be positioned elsewhere in the engine bay.

This results in shorter installation space requirements. Since the inline-six is narrower than V6, the ancillary systems are positioned on the left and right of the engine.

The engine is turbocharged but also has a 48V-powered electric auxiliary compressor (eZV, or electric turbo) to eliminate turbo lag. The starter motor has also been replaced with an Integrated Starter-Generator (ISG) installed in between the engine and the transmission that can provide a 15 kW boost to the engine.

Total output for the engine can go up to over 408 horsepower and over 500 Nm, while CO2 emissions have reduced by about 15 percent compared to the outgoing V6 engine.

The engine also includes a particulate filter in the exhaust system, which is something you usually see only on diesel engines. For petrol engine particulate filters, Mercedes-Benz is using cordierite, instead of silicon carbide which it uses for diesel particulate filters.

This engine will debut with the W222 S-Class facelift next year.

New OM656 inline-six diesel engine

Lovers of big diesel engines will be able to enjoy more power – the OM656 is now expected to do 313 horsepower up from 258 horsepower of the outgoing big diesel, while consumption is reduced by seven percent.

The OM656 uses stepped-bowl combustion, two-stage exhaust turbocharging, and a new feature for Mercedes-Benz diesel engines – CAMTRONIC variable valve timing.

New M176 V8 bi-turbo petrol engine

As expected, Mercedes-Benz’s non-AMG V8 is now 4.0 litres, following the direction set by AMG’s new V8 engine. From its 3,982cc displacement, peak horsepower is 476 hp (up from 455 hp) with peak torque of 700 Nm kicking in from 2,000 rpm.

The closed deck V8 has cylinder deactivation, which allows it to run on four cylinders during light loads and engine speeds of up to 3,250 rpm via the CAMTRONIC variable valve timing system. It uses a particulate filter as well.

This new engine will debut in the W222 S-Class facelift.

New M264 four-cylinder petrol engine

Most Malaysians will be buying 200 and 250 badged Mercedes-Benz cars, so this should be the most interesting bit to read about. Like the M256 six-pot, the new four-cylinder engine gets a 48V system. The turbochargers are now twin-scroll turbos, and there’s a particulate filter in the exhaust system.

However, instead of an ISG sandwiched in the gearbox, the M264 uses a belt-driven 48V starter-alternator (BSA) mounted where the conventional alternator usually sits. Mercedes-Benz says the BSA will allow improvements to the engine’s auto idle stop/start operation, electric boost at engine speeds of up to 2,500 rpm, energy recovery up to 12.5 kW and coasting with the engine turned off.