I have a spare RNS-D from a 2002 A8 i beleive. I bought it a while back to install into my A4 but have since sold the car, and the S8 that replaced it already had one fitted.
I have test the unit and it is fully functional and comes with a navigation disc (unsure of age) and the code.
This will fit all face lift A8's and S8's with double din size centre consoles - an excelant upgrade from a symphony and a pretty straight forward swap.
I would like back what i paid for it, £150.
Nick