Om422 Engine Workshop Manual - //top\\

: Varies from 16.9:1 for naturally aspirated models to 16.25:1 for turbocharged versions.

Mercedes has a "Classic" division that reprints manuals for vintage machinery. You can order a high-quality reprint of the OM422 manual from the German HQ. Expect to pay $150–$300 USD. This is the legal, perfect copy. om422 engine workshop manual

If you want, I can:

The Unimog and MB-trac enthusiast communities are fanatical. In the files section of the "OM422 Owners Group" (Facebook), users often share scanned copies of the "Engine Section" of the Unimog 427/437 workshop manual. This is the same engine block. : Varies from 16