Airguard350, The sensor for the auto dimming side mirrors is on the rear view mirror, so of course there are going to be wires running from the mirror to the roof. And no there is no flip tab on my rear view. I can't possibly see why audi would make the side mirrors work and not the rear view. The rear view hasnt dimmed since ive gotten the car, so i couldnt say if its ever worked. Andrew you think older air cooled porsches are alot like these audi's? I think there worlds apart.