That's my post. It's about a twenty minute fix once you remove the instrument cluster which should also take about 20 minutes. The fix is simply to bugger up the shaft with something so the press fit is tight again. Some people suggest a punch, I just used a vice grip. The directions to repair it are found in a thread somewhere on this site and are very good. You will need to push the shaft out, on which all the numbers turn, with a drill bit the same size as the shaft to hold everything in place while you work on the shaft.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13