Read something about this months ago about DEAD PEOPLE showing up at your doorstep. Grandpa decides to drive to his son's house for Thanksgiving several States away. Puts on the autopilot and settles in. Something happens along the way and he shows up and parks at his son's home. When the family runs out to greet him, they discover that he has passed away during the drive.
Autopilot in cars could potentially drive dead people to wherever they were heading before passing on.