Hello everyone!! I am new to the Audi ownership. I just recently acquired the car from a buddy. So, to get to the point. It is a 2001 A4 B5 2.8. I have no functionality of my windows, door locks, or power mirrors. Things that I have done to possibly solve the problem; replace modular in the right rear section of the trunk that is called the comfort control modular. I have checked the wires in the door jams for any grounded out or exposed sections of wires. The motor has been replaced the guides have been replaced and the regulator as well. I even went as far to order new individual switches for the master switch.i even lifted the carpet on drive side to check for a module and there was not one. I have just recently had to sell my check due to finical issues and I need the help so I will be able to drive my kids around when need be. I really appreciate anyone's suggestions and knowledge.