hi i was wondering if anyone can help, i have a 98 a3 and i want to change the stereo, i need to know how to get the standard stereo out, also where the wires can go to put amplifier cables through the car, also when i go into reverse, the car nearly stalls, revs drop under 1000, then when you put it into 1st it does the same, also kind of jolts when your in 2nd. any help would be greatly appreciated, have been looking on this site for a long time and it has helped me learn alot about my car. keep up the good work. thanks