I have had the same junk happen to me one time. I had just driven a few miles to pick my daughter up from school and then it happened. I tried it 3 or 4 times and was about to call roadside assist when It started fine. I never went to the dealer as it hasn't happened again. I just assumed my 12v wasn't all the way charged. Something has to be done about this. I hope ford is listening. My leaf has given me no trouble.