Perhaps someone in the "ML, G-wagon & Unimog" forum will be able to point you in the right spot. There are a few G-wagon owners here at The Shop, but they don't always hit the tech forum.

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Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.