I have just purchased my first Audi ever, a White 2011 A4, with Premium Plus-Sport Packages, automatic tranny. I have been a BMW owner almost all my life and really love my first Audi, but my car has very little throttle response,I suspect a clogged fuel system/injectors. Also my A/C does not throw out a large quantity of thrust. I road tested another A4 from a friend, (a 2010 A4) and in his car the throttle response is awesome and the A/C works perfect. Any suggestions would be fondly appreciated.