ok im trying to find out if i have a tv tuner in my 01 x5...it has the 4:3 navigation installed (plan on upgrading to 16:9 soon)...there is a metal box mounted to the top of my navigation drive behind the left panel in my trunk..is this it?? Also if i dont have one what has to be done to install one after upgrading to the 16:9, and will i be able to connect a dvd player and backup camera to the tv tuner??