Electrical puzzle
 

I had a shop replace the alternator on my 1993 190E 2.6. Now when I shut off the car and remove the key from the ignition, the SRS light will come on when I open the door. Likewise, if I have the radio on when I shut off the car it will come back on when I open the door. It goes back off as soon as I close the door. Does anyone have any theories as to what's going on here? I don't know where to start looking. Thanks