The OM646 uses a driving both camshafts from the crankshaft.
: While generally solid, engine life is optimized through regular maintenance of the fuel system and cooling components. NV Euro Motor Works Common Applications Model Series Common Badges Engine Variant C-Class (W203/W204) 200 CDI, 220 CDI OM646 / OM646 EVO E-Class (W211) 200 CDI, 220 CDI OM646 (various outputs) specific procedure Mercedes Workshop Manual Om646 Engine
If you are planning a timing chain replacement on an OM646 (e.g., in a W203 C220 CDI), The chain is at the transmission side of the engine. This often requires: The OM646 uses a driving both camshafts from the crankshaft
To help narrow down future troubleshooting or repair steps, tell me: What and year are you working on? This often requires: To help narrow down future
A good workshop manual provides clear troubleshooting flowcharts for known failure points unique to this engine family. The "Black Death" (Injector Seat Leakage)