The guy selling this has dealt with a lot of the guys on another MB diesel list and is thought of as a source of info. Since he seems to import these and a lot of MOG stuff, he probably knows the degrees you want. ( I think the Ferret piezo we would use is the 6.0mm. "clamp", not 6.5 or 6.35 AFAIK).
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2408627139&category=6754

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)