A lifesaver when you’ve forgotten how the belt weaves through the tensioners and pulleys.
A genuine Mercedes Workshop Manual (often accessed via the system or a factory DVD) covers these vital areas:
The OM646 is notorious for the crankshaft bolt loosening. A generic manual says: "Torque to 200 Nm."
The is a 2.1-liter (2,148 cc) inline-four cylinder diesel engine used across several models including the C-Class (W203, W204), E-Class (W211), and Sprinter (W906).