After a couple days of rain, drove my 94 E420 to pick up something, on my way back, the sunroof pull back open by itself, stop it halfway knowing the motor is weak and might not be able to fully close it later. So I have to close it manually from the trunk. Next morning, I discover the right dash light bulb burn out, antenna stop working, did not even hear the motor running. Got the light bulb replaced. Have my mech check it and there is current running just the antenna has no response. Did I short circuit something when I was turnning the emergency to close the sunroof? Did I ruin the antenna motor? Or some circuit board inside? What to check next? And where to get the replacement part?