The OM646 is a

turbocharged In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into the ...

inline-four engine A straight-four engine (also referred to as an inline-four engine) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft. The majority of automotive four-cylinder engines use a straight-four layout ( ...

produced between 2002 and 2010 by

Mercedes-Benz Mercedes-Benz (), commonly referred to simply as Mercedes and occasionally as Benz, is a German automotive brand that was founded in 1926. Mercedes-Benz AG (a subsidiary of the Mercedes-Benz Group, established in 2019) is based in Stuttgart, ...

Design

The OM646 engine is sold under the 200 CDI and 220 CDI designation and features an electric

fuel pump A Fuel pump is a component used in many liquid-fuelled engines (such as petrol/gasoline or diesel engines) to transfer the fuel from the fuel tank to the device where it is mixed with the intake air (such as the carburetor or fuel inject ...

exhaust gas recirculation In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide () emissions reduction technique used in petrol engine, petrol/gasoline, diesel engines and some hydrogen internal combustion engine vehicle, hydrogen engines. ...

, particulate filters, and

Euro 4 The European emission standards are vehicle emission standards that regulate pollution from the use of new land surface vehicles sold in the European Union and European Economic Area member states and the United Kingdom, and ships in European ...

emission standard Emission standards are the legal requirements governing air pollutants released into the atmosphere. Emission standards set quantitative limits on the permissible amount of specific air pollutants that may be released from specific sources ov ...

compliance (from 2003). In 2006, the engine was updated under the EVO name and replaced the OM647 engine. It features a reduced compression ratio of 17.5:1, a new turbocharger, and ceramic

glow plugs In a diesel engine, a glow plug (also spelled glowplug) is a heating device used to aid starting of the engine in cold weather. This device is a pencil-shaped piece of metal with an electric heating element at the tip. A glowplug system consis ...

for improved engine starts.

Models

OM646 DE22 LA R

* 2003–2006 W211 E200 CDI * 2003–2007 W203 C200 CDI * 2003–2010 W639 Vito 109 CDI, 111 CDI, 2.0 CDI * 2008–2010 CL203 CLC200 CDI *2003-2009

Chrysler PT Cruiser The Chrysler PT Cruiser is a subcompact car that was built by the American company Chrysler from 2001 until 2010. Introduced as a five-door hatchback wagon, a two-door convertible variant was also made from 2005 until 2008. Originally planned ...

OM646 DE22 LA

* 2002–2006 W211 E220 CDI * 2004–2007 W203 C220 CDI * 2003–2010 W639 Vito 115 CDI, 2.2 CDI * 2005–2010 C209 CLK220 CDI * 2006–2009 W906 Sprinter 209-516 CDI * 2008–2010 CL203 CLC220 CDI * 2010–2013 Vito (Chinese market; known as OM646 980) * 2003–2009

OM646 DE 22 LA EVO R

* 2006–2009 W211 E200 CDI * 2007–2009 W204 C200 CDI

OM646 DE 22 LA EVO

* 2006–2009 W211 E220 CDI * 2007–2009 W204 C220 CDI

References

{{reflist, 30em OM646 Chrysler engines Diesel engines by model Straight-four engines