Thanks, I tried that (admittedly only 3 or 4 times) and it made no difference. Dealer wanted £150 to diagnose it - no thanks! Do you know this works, have you tried it because it happened to you? I don't know why anybody would design a system that did this. If it is accidental, i.e. sloppy design, I could understand it but then you would think Audi would have been inundated by customers; I did send a message to Audi.co.uk but, like last time I contacted them, not even the courtesy of an acknowledgement!