Currently this option only appears to be available in the Japanese
market (for reasons connected with liability/legality). If it had been
available in the UK I would have got it. Hopefully it will be a small add on later. I would like to hear any posts from any Japanese owners on this.
There was a discussion of this somewhere. Apparently the self-parking option is outrageously expensive. Much more practical is a proximity alarm. One person posted a picture of a little antenna for the front license plate so you can see where the front of the car is.