Was getting irritated at finding nothing but $400+ trailer hitches for my 300TD I decided I'd look in France since I'll probably head over there for spring break.

Came across this site : http://www.mercedesw123.info

which has some great DIY stuff. I've even seen the exact fix for the clock that Richard Easley came up with here :

even if you can't read french a lot of the articles have good photos.

edit : HA...just found the DieselGiant odometer fix too...looks like they use solder though

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1982 300TD 210K miles ("The Replacement" aka "The Anvil") - SOLD
1979 300SD 245K miles (never ending project)
2007 Pinarello F3:13
1995 Ducati 916 (SOLD, sniff)
1999 Ducati 900SSie (SOLD)