Recent failure of 2005 PRIUS. My sister was driving the Prius. She needed to stop quickly and they smelled something burning inside (she felt it was electrical) She pulled off to the side and checked on the car and found nothing on fire. they thought they might have smeeled other cars that had smoked their brakes during the quick stop. So by not finding thesmoking gun she decided tocontinue on her trip and 100 miles later on the interstate it automatically switched to neutral. The car slowed down and left her stranded on the highway. After struggling with the car for a while and trying to restart it nothing would happen (No lights (Dash, cabin or headlight) start button also did not light up). Once help arrived they could not load the car on the trailor because the car was (locked in gear or park). Finally a tow truck driver arrived and he tried to jump the car (unsuccessful) then he was able to get the car on a flatbed. The car was taken to the closest dealor. They were almost useless. They told them they don't know what is wrong with the car and would have to just start throwing new parts at it and start at one end and work through the entire car. Any ideas are more than welcome. the car has over 100K miles when we gave them the car last year.