I'm gonna pull some stereo equip out of a friend of mines vehicle tomorrow. One of the things in there is a chameleon head unit. I have never messed with one of these, but I figure it is going to need some release keys of some sort to get it out, however, he says he never got any keys when it was installed. Long story short, do I need keys to get a chameleon out of a vehicle? Its in a new Passport.