I’ve had this problem come up a few times with my 2006 RRS. It seems to only occur when I park in my steep driveway. A friend guessed it might have to do with the transmission so he recommended I set the parking brake in neutral before I shift it into park when parking. It worked like a charm until last month. Usually, all I had to do was move the shifter from park to drive once or twice and it would go. But this last time, after sitting in the driveway for 1/2 hour, I tried slamming the shifter from neutral to park hoping it was more a mechanical problem than electrical and it worked!