Rotate an OM642 V6 engine to see exactly where a sensor is hidden.

For the W639 model (produced roughly 2003–2014), the most reliable resources for digital workshop content are listed below: Official & Comprehensive Workshop Manuals

There is a lot of confusion regarding copyright. The official source is Mercedes-Benz . A yearly subscription costs thousands of dollars.

: Intricate wiring diagrams and fuse box layouts.