i have a 98 a6 not sure what else fits hopefully somewhere around 90,000 miles

 

You can just go to the dealer and get a "new" (refurbished) one, which then can be properly coded in your car to repflect the correct mileage. If you put in another cluster with the wrong miles, you would be technically misrepresenting the odometer, which will kill you resale. If you turn in the old cluster, you will get back the "core" charge. Net cash out about $400. You do need someone with a VAG COM to help you.

Check out this tech article from another forum: Instrument cluster replacement

 

whats a vag com???