Hi, I have a 2000 e320 and the radio some times wont shut off. I would park the car with the radio on take the key out of the ignition and close the door and lock the car with the key pad and the radio would stay on. I would have to get back in the car shut the radio off manually. The radio should shut off when I take the key out of the ignition but some times it does not.Any sugestions. Also the display on the radio does not work some times.I would have to turn the radio off then on for the display to work. thanks Anthony