I've got a 2000 A3, for which I bought a VAG-COM lead- it's OBD2. My wife has just got a Mk5 Golf, which I believe runs on CAN-BUS (?). I want to be able to do home diagnostics on the Mk5, so what are my options? Do I need to buy a new lead (PC to Car) and get more software OR is it just a case of getting new software? I've just got the basic Ross-Tech VAG-COM installed on my PC. Thanks-in-advance.