I just bought a used 500 sport. It had blue & me on the window sticker, but not navigation. I bought a used tomtom from a 500 owner who no longer wanted the unit. I can't get it pair to the 500 properly. Phone connects fine to the car and to the Tomtom. Anyone know if I'm missing a module or software to make it work? My studio is no help, no knowledge and no interested in help.