Audi (and any other car manufacturer) only care about a problem if its going to hinder their warranty process. They're in the business of selling new cars, so if a radio packs up on a 10 year old car, they might take it on board sure, but only to fix the problem going forward. They're not going to replace the component on every car unless its safety critical...
Junk the crappy OE unit and fit a decent aftermarket unit.