I have a 51 plate S3 and want to use vagcom. I have downloaded the latest release from the website, I also have the obd2 usb cable off ebay, but cannot get the interface to work. How do I get drivers for this or get it to work. It is not the ross-tech interface.
best bet is to contact the seller for drivers, as they're going to be pretty much unique for the interface you have bought.
After READING this page...
...you should have noticed that the latest versions do NOT work with 3rd party interfaces like they are sold through ebay.
The only versions that might work with your interface hardware are 311/409.