my wife has a 2001 330ci with a broken window switch on the passenger side. it is the type where you push or pull and it automatically raises or lowers the window. we pulled up to raise the window and the switch broke, had to activate the switch with a screwdriver to raise the window. how do i remove and replace the switch?? where is the best site to find a replacement switch? bought the car last year and she loves it, it is our first bmw. thanks in advance