I have a weird issue with my 2013 Ford C-Max. I park the car and turn off the car. When I open the door, the radio does not go off and none of the audio controls work. When I turn the car back on, none of the audio controls work and the hands-free voice activation doesn’t work. It’s happened 4 times. Each time I take it to the dealer. The first 2 times, they disconnected the battery and it started working properly. But each time it happened again after about 2 months. The third time they thought it was the radio so I paid $700 for a new radio. It happened again 2 months later. Right now they have no clue what’s wrong with it. They contacted Ford engineers but they are telling them to do stuff that they’ve already tried. Any ideas from this group would be greatly appreciated. Marilyn