Mercedes Workshop Manual Om646 Engine Verified

The OM646 introduced significant advancements in fuel injection. The workshop manual demystifies this complex system:

The Common Rail Diesel Injection system is sensitive. The manual outlines:

Disclaimer: Always follow safety procedures for high-pressure diesel systems. Never work under a vehicle supported only by a jack. This article is for informational purposes; verify all procedures with your specific model year manual.

Operating at up to 1,600 bar for better fuel atomization.