Try doing a search on your specific problem, it's been covered many times. You'll find answers on how to try and repair at home as well as several shops which can rebuild/refurbish your speedo head. One of those shops is Steve Brothertons.

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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.