Thanks guys,
Reason for my asking are these two things:
- I've experienced now twice how the using the parking brake causes the rotors to get 'wobbly', particularly when parking for a week or more in very cold weather;
- and what do you think can happen to the auto gearbox when parked in just 'P' (and no parking brake) if the car is hit front or behind, like e.g. in a carpark? I can imagine it could damage the gearbox?

Cheers!

__________________
2011 Prius