Mercedes-Benz OM646 engine


The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz.

Design

The OM646 engine is sold under the 200 CDI and 220 CDI designation and features an electric fuel pump, exhaust gas recirculation, particulate filters, and Euro 4 emission standard compliance. In 2006, the engine was updated under the EVO name and replaced the OM647 and OM648 engines. It features a reduced compression ratio of 17.5:1, a new turbocharger, and ceramic glow plugs for improved engine starts.

Models

OM646 DE22 LA R