... and obd11 requires that you use their dongle. If they go out of business, you have lost your investment. Running something like VCDS Lite, VAGCom Pro or CarPort diagnostics off of a Windows machine would mean you can buy any cable and it ought to work (though each have their own recommended list).
VCDS is the original and a very good choice but it's not cheap and comes with VIN limitations. Fake copies off Ebay are not to be recommended, and it's possible that the software will demand you're online while configuring.
Pro OBD11 will give you long coding, which you don't have in the basic version; you'll also get the "guided" stuff, but most of that is not really useful for the A2 as there's not much to be edited, unlike, say, a 2016 Octavia. That's why I have the Pro version of CarPort.
- Bret