Hi I've just picked up my first VR6 and its a great car! I have a couple of niggles with it, one being the rear passenger window. It's won't wind down. Using either the control in the dash or the rear switch I can hear a click at the window, so I asume that the relay, wires and switches are ok. DOes this only leave the motor being knacked? If so, can I replace just the motor and is it a pain to do? Thanks Paul