I just bought A4Q and the 7 years/100k miles extented warranty is $2.3k. Since this is my first Quattro and I heard only Audi dealers can fix it, I was wondering if Quattro has problems after 50k and if $2.3k is too much .... Bought extended warranty for other cars at $500-$1k so $2.3k is a lot of money ! Thanks for any inputs.