Very weird. Suddenly, when I went to stop my car, the radio did not turn off when the key was out. I figured it'd reset when I got back in, so I manually turned the radio off. When I restarted the car, the radio continued to work, but my windows would not go down. When I stopped the car, same thing; radio did not turn off like it normally does when the car is turned off.

Any ideas?

1991 300d, 94k