The OM646 relies heavily on its turbo system. The manual provides:
Before diving into the manual, it is important to understand what makes the OM646 unique. It succeeded the OM611 and introduced several refinements: Mercedes Workshop Manual Om646 Engine
The Essential Guide to the Mercedes-Benz OM646 Engine Workshop Manual The OM646 relies heavily on its turbo system
Testing and replacing the fuel pump.
Specifications for MB 229.31 or 229.51 oil grades. Mercedes Workshop Manual Om646 Engine
This section is the "heart" of the manual. It includes procedures for: