Hi John, The quickest way for you to get access to a wiring diagram would be from the Erwin website. You can purchase different access options, I bought one recently for a Sharan which cost 25 euros (£22) which gave me 24 hours access with the ability to print.
Regards Dave
https://erwin.audi.com/erwin/showSubscriptions.do
Copy and paste link into your browser, for some reason can't get it to show properly !