New Oner - Backup camera, AUX IN & parking sensors

New owner...Bought a 2005 with a great number of options (Don't know the package number, I think #8 or #9)...It has NAV but no backup camera (Was this not available in '05?), no AUX IN jack for the 6 CD JBL stereo and no parking sensors for front/rear.

Curious what, if possible, were the options to get these 3 things added on?

I've seen the threads about the aftermarket license plate cameras but I wanted to know, is it possible to add it with some sort of OEM camera so that it integrates with the NAV system as if it were standard?

Not sure if the parking sensors issue goes long with the backup camera but curious about that too...I've seen some ugly after market ones and would like to steer clear of that too, if possible

The AUX IN jack surprised me that it wasn't a part of this car but I would like to have the option of hooking up my MP3 player too.

P.S., how do I know (Without trying), if my stereo will play MP3 CDs?


Thanks