By the way, I love Apple products, have 8 or perhaps 9 (may have a shuffle hidden away somewhere) within the household. Having tried numerous alternatives (Samsung, HTC, Nokia, Blackberry) ended up with an iPhone on my latest upgrade and won't go back.
Apologies if that has caused you undue distress.
Back on topic, OP get it back to Audi and get it checked out.
At the end of the day, whether I like the option or not, you have paid for it, so if you think something isn't working as it should, get it checked.