Sorry about the double post. I tried to edit the post to add the word "whole" while describing the chain in the near last paragraph, and somehow got two posts in a strange order. Once the whole chain has left the path on the driver's side of the engine and is sitting in the oil pan or below the crankshaft gear/sprocket, it is a lot of work with things like the injection pump timing requiring know how and tools that I surely don't possess so I would tow it to someone who does. Jim

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Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)