Hi i know this should maybe go in the ICE forum but as its A3 specific... Im keen to start swapping my stereo over but the damn audi build quality is a pain! Can anyone briefly tell me how to take the door cards out, speaker size? Also I dont know if i have the bose sound system, id guess not (how do i check). I do have an extra power source running from the existing head unit i presume into the box behind the left hand panel in the boot - sub, amp, bose system? im confused! anyway thanks!