can anyone help, i was driving my a6 2.4 1998, when all warning lights flickered on , speedo and rev counter, fuel gauge, petrol gauge, stopped working, did this for a coup[le of times now its like it all the time, and when you turn off car the key code light stays on. the car still starts and drives the same. also when take the key out of ignition the back lights and stereo lights still stay on along with keycode light