I installed my nav system in my 03 RS6 awhile back that I bought from Haagie, system is great and works fine. My question is this I never VAG-ed it, should I have? I dont know what tire size is programmed etc.
The RNS-E will adjust the tire size itself and if you see the navi info on the DIS you are all set. That's the only VAG-COM change on the car, everything would be changed on the RNS-E and that has probably already be done by Haagie.