Sorry for such a simple question. I've looked and can't find the answer (and haven't yet asked a dealer). I currently have a 2005 A4 Cabriolet and am curious as to what the difference between the A4 and A5 is (since the convertible is now an A5). I did a quick glance at the dealership when my A4 was in for service (but this was early morning and before any salespeople were in) and can't see any real difference. thanks.