Sorry to be giving everyone a blow by blow description of what's happening but maybe someday it will help someone. I did go out this evening to try to start my XF and it started right up. Picked up my daughter and on the way home it stalled out at a stoplight in traffic. This is the first time this has happened. It then decided that it was a good time NOT TO START! I was able to roll down a hill and get off the main road where I waited a few minutes and (miracle of miracles) it started! Drove it home where it will stay until it goes back to the dealer. If the situation was intolerable before it just got a lot worse.