Hello all. I decided to have a little fun today. After turning off the ESP (light on) I gave my 2003 S4 a brisk work-out. It was great fun having 4 wheels spinning! After I had my fix, I pressed the ESP button to switch on the ESP system, but the light will not go out. I have tried leaving the ignition off for 2 hours, but now, when ever I start her up, the dam ESP light is always on! How can I fix this? Can I read fault codes via the aircon? By the way,the car still drives perfect. Thanks in advance.