How long has the odo and trip odo been non-op? Did you by chance reset the trip odo while the car was moving? Sometimes this causes a jam which stops the works, sometimes the jam can be cleared by multiple attemps at resetting the trip odo. May not always work, but an inexpensive try.

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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.