W126 Electrical gremlins
 

My 420 sel's radio and antenna only work with the drivers door open. Does any one know where the wiring from the drivers door terminates inside the car? This problem was preceded by an issue with the drivers door light working only when the passenger door was opened. Also does the overhead light selector have anything to do with this? Thanks.

There are 2 radio fuses..

Also the seat diode can short & cause feedback on that circuit.