recently my speedometer stopped working so i figured the speedo itself or something in the cluster was messed up so i pulled it completely out and checked over all the solder points on the speedo and the cluster electronics, it all looked fine so i figured it might have been the speed sensor, i replaced that and still no luck, at this point im thinking the wiring from the the sensor to the speedo may be shot?, what do u guys think?

The .10 mile wheel has broken free from the shaft and spins freely instead of turning the next mile when it goes beyond the .9. This has been a common problem with Audi's for 20 years that I know of. I have fixed them, but you need to completely disassemble, and arefully epoxy, of superglue the white wheel to the common shaft. Be careful not to let glue go elsewhere