I Agree, Audi do produce smashing cars, BUT....... try and claim for rust bubbling on your front wheel arches under their 12yr corrosion free warranty and the first thing they do is try and get out of it, claiming it's as a result of stone chips and therefore not covered under their corrosion warranty. Best you will get is a 70/30 split on the costs. They will try and totally ignore you if the car was serviced at any independant garage and not an Audi Dealership. This is documented hundreds of times.
Roof Corrosion on the runners........... Same Story
I just replaced the complete timing gear on my S4 B6 using all genuine parts, running into thousands of pounds. Having put the engine back into the car I found that I had an issued with the variable timing, it was not retarding. This was found to be as a result of defective items, the electronic timing solenoids (Audi described the fault being due to a manufacturing defect)....... I had to remove the engine again, dismantle the back of the engine and the items were replaced by Audi....... Did they pay me or my garage for the costs involved in removing the engine again ......... No, they didn't want to know.
Are Audi aware of the timing chain tensioner issues on the Audi S4 V8.... YES. The tensions fails (Cracks) after about 60 - 80k miles on the S4 V8....... YES they are aware !!!!!! Have they ever done anything about it ...... NO, they even sell the original item when it needs to be replaced, no modifications to resolve the issue, which would be very easy to do, even I can see how the issue could be resolved.
Audi do build smashing cars, but their customer relations is CRAP.