The OM656 is a

turbocharged In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

diesel engine The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-ca ...

produced by

Mercedes-Benz Mercedes-Benz (), commonly referred to as Mercedes and sometimes as Benz, is a German luxury and commercial vehicle automotive brand established in 1926. Mercedes-Benz AG (a Mercedes-Benz Group subsidiary established in 2019) is headquarter ...

since 2017. It was first introduced in the facelift W222 S-Class.

Design

The OM656 is based on a modular design that is shared with other

4-cylinder The engine configuration describes the fundamental operating principles by which internal combustion engines are categorized. Piston engines are often categorized by their cylinder layout, valves and camshafts. Wankel engines are often categoriz ...

and

6-cylinder The engine configuration describes the fundamental operating principles by which internal combustion engines are categorized. Piston engines are often categorized by their cylinder layout, valves and camshafts. Wankel engines are often categoriz ...

petrol Gasoline (; ) or petrol (; ) (see ) is a transparent, petroleum-derived flammable liquid that is used primarily as a fuel in most spark-ignited internal combustion engines (also known as petrol engines). It consists mostly of organic c ...

and diesel engines. It is the replacement to the previous V6, in order to maintain the cost of production between different engines. The OM656 has dual overhead camshafts with variable valve timing, and uses AdBlue injection and exhaust gas recirculation to reduce emissions. The cylinder walls are coated with arc sprayed steel whose increased porosity aids oil film strength to reduce friction.

Models

OM656 D29T R SCR

* 2017–2020 W222 S 350 d * 2018–2020 C257 CLS 350 d * 2018–2020 W213 E 350 d *2018–present W463 G 350 d *2019–present V167 GLE 350 d *2020–present X167 GLS 350 d *2021–present W223 S 350 d

OM656 D29T SCR

* 2017–2020 W222 S 400 d * 2018–present C257 CLS 400 d 4MATIC * 2018–present W213 E 400 d 4MATIC *2018-present W463 G400 d *2019–present V167 GLE 400 d *2020–present X167 GLS 400 d *2021–present W223 S 400 d 4MATIC

References

{{reflist, 30em

External links

OM 656. Most powerful diesel car in Mercedes-Benz history
OM656 Diesel engines by model Straight-six engines