Yesterday my Prius got stuck in N and would not go into R or D, and I could not power down either. It finally did power down and I was able to reverse but it was very stressful because I was in an automatic garage that parks and stacks cars without human intervention and I was nervous the thing was going to time me out and repark my car with me inside, trapping me indefinitely. I've read through the forum here and it seems this could be a 12V battery issue, which I will have checked. I just wanted to log this for reference. My Prius is a 2004 with 100,000 kilometers. To say I love it would be an understatement. It's never given me a reason to distrust it until last night.