Thanks to Bob for his information above. This helped me with the same issue. Unfortunately in my case the server motor and cog are OK, but the cog has snapped off the plastic "paddle" that it operates! For info 15mm copper pipe fits neatly into the hole and if a slot is cut in the end the paddle can be turned enough to give some relief from the icy blast! Not sure that making a hole in the side of the glove box is really going to be a satisfactory final solution though!
Mark S, January 2011