I have a 92 500E that has been experienceing a slow battery drain. I have trouble shot it a little and it seems to be pulling current in the convenience module circuit. I know that the module is good, however the door switches do not work the windows/sunroof. I was checking the window switches and they are always hot (run the motors with the door closed and ignition off). Also, the sunroof would at times open by itself (I unpluged it from the convenience unit). The alarm does not seem to work, either. Door lock functions do work.

The start of my questions is related to the windows always being hot, which I do not think is correct. This looks like a symptom of the issue. What should I look at to resolve?
Thanks,
Lee