Hi, I have a problem with the driver's window mechanism on a 1993 300D. With the window completely up, if I push the "up" bottom, the motor makes a trrrrr sound, like the teeth are worn or something. If I push "down", the window moves down a couple of inches and then it stops with the trrrrr sound. If I help it down with my hand, it goes down all the way, with stages where the motor seems to work fine followed by trrrrr.

- First of all, can anybody diagnose the problem with the information that I just gave you?

- Second, assuming that the problem is something worn out in the motor/controller/whatever unit, how do I get it out??? I see five nuts that seem to fasten the window linkage to the door, but I can't see how the motor is attached.

Thanks in advance for your help.