I was wondering if the new models come already with a GPS installed. Of course luxury cars should have them, but is it on the package of optional things to add to your car? My friend got herself a new one that she can exchange between cars, and even can download a little program so she can use the GPS while going on the bike too. Is the feature OnStar still available? I haven´t been in the States for too long lately. I´m just curious. Can anybody tell me?