The W124 manual I posted a link to only covers the .91x (non-turbo) engines, although the pump mechanicals are essentially identical to the .96x (turbo) versions. Interestingly, the EPC does not show any part numbers for the delivery valves or O-rings on any OM606 engine in the 124 or 210. Hmmmm. Strange! I'll have to look at the WIS again when I get home.

I don't recall seeing any procedures in the WIS for delivery valve O-ring replacement for the 606.96x engines, and that may be on purpose... MB probably wants the whole pump repaired by a Bosch shop if there are any fuel leaks. (??) I'll double-check though.