Hmmmm, if they're 17" they're not "Genuine Audi RSTT Alloys". They're the ones they put on A2s etc.
Were these not optional wheels for A3s?
They were available in 17" on run out A3's 8p models.
Hadn't realised they were factory fitment to some A3s. The A2 I was loaned by Guildford Audi had the same 17" wheels, albeit with rubber-band like low-profile tyres.