I have a 2011 Regal built in Russelsheim Germany as well and I haven't had any of those issues, yet. (Knock on wood) My heater element for the seat had to be replaced under warranty. I have had an occasional rough idle that can't be reproduced by the dealer but that is it. Sorry for your problems. It is very frustrating to be without your car. I know, mine was rear ended and I was without it for almost 3 months.