'99 E320 Rear Door Panel Removal?

[mjcmt]

I have a '99 E320 and the rear passenger window went down and will not go up on its own power.

How do you remove the rear door panel as I assume I will have to remove it to address the issue?

What could the problem be? Initially you could hear the mechanism operating, but no window movement upward, only downward. I pulled the window up by hand and it will stay up and slide down about 1/4".

There seems to be no power to window (as I hear no noise now), so the magic question is how to fix it?

Mike