Having an Audi for 7 years and still driving it while waiting for the new car arrives, no issues at all. But I heard Jag and RR do have lots of issues, such as their adaptive suspenion which cost a fortune to fix.
2015 Cayman S, 2013 550i M Sport
Gone but not forgotten:
2006 2.0T A4 Avant, 2007 Z4 Roadster 3.0si, 2006 M Roadster