A comprehensive OM646 workshop manual (e.g.,) typically covers the following areas:
The Essential Guide to the Mercedes-Benz OM646 Engine Workshop Manual Mercedes Workshop Manual Om646 Engine
Before buying any manual, verify your engine’s full code (stamped on the intake side of the engine block, e.g., OM646.982 ). Use that code to ensure the manual covers your specific injection pump, turbo, and emissions configuration. A comprehensive OM646 workshop manual (e
Accurate tightening is vital for diesel engines. Technical guides such as the Mercedes-Benz Engine Torque Specifications (hosted on ) provide these common settings for the OM646: Torque Setting Cylinder Head Bolts A comprehensive OM646 workshop manual (e.g.