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.
Do you have any more info on this? Did they access the switch from inside the car or underneath?