There is only one real way on the 07 and newer, most dealers know the trick but will not do it. I live in Salt Lake I got a local mod shop to jump the wire on the shift switch, it tricks the nav into thinking you are in park. 45 bucks, I have Levinson so I watch DVD and use the phone the whole deal, it will hurt your warranty, but the wire is back in the shift area the dealer will never see it.