Probably 80% of the time I re-enter the vehicle I need to re-tune/re-enter Sirius Satellite Radio despite actively listening to it just before shutting down and exiting the vehicle? Abut 20% of the time it's automatically up and running when I start up again, just like you would expect it to be. Crazy, eh? Anyone have any ideas about why it frequently keeps going off-line when shutting down?