http://www.germanautoparts.com/vagcom.php

want to buy one cuz i own a 20th gti and the A8

which one would fit in the A8

 

Your car doesn't have a CAN bus so you don't need the expensive cables, either one will work it depends on if you have a serial port on your computer or USB port.
The serial ports seems to work better and faster, except a lot of newer computers don't have a serial port, just USB's.

 

Before i go out on limb here what year A8 do you have?

 

2000

 

Ok a D2, then yes you don't have CAN so buy either the first two.

 

thanks