I have a 1998 C280 Mercedes. the driver's door window does not work unless it is a hot day. I found out that it is the part inside the door that is shaped like a triangle (electrical) that seems to have the problem. I used my hair blower on it and the window and rearview mirror worked. I want to buy a new part but I just dont know what this thing is called. I know that it is not the motor. It is the electrical box that controls the window and left rearview mirror..please help and if possible give me the part number