Audi have offered me 19.5k for my car, which is about right for trade, so I think as soon as I get back from the road trip I'll try to flog it for as much as possible, and if I can't shift it before the new plate comes out I'll just give it back to Audi.
So it's lost ver near a third of it's value in under a year, thought the S3 was supposed to have superior residuals to the rest of the A3 range and other competition.
Maybe better to sit in it another year before you move on...