I have just bought a RNS-E system to fit my 2002 A4. I need Vagcom to make changes such as Tyre size lhd/rhd etc.. Plus it would be useful for future use!
I'm a little confused as where to get Vagcom from. Can i just down load the shareware from Ross-Tech and then buy a cable off ebay and it will all work. Or is there more to it then this???