Just curious on my audio system in '13 SL.. I have Bose package and wondering if there is a stock Sub-woofer and were might it be? Also, why do i not have a audio input jack (AUX), but only a USB and an Old audio video (red,white,yellow) input inside my council? Does only the vehicles with navigation have that standard? I have blu-tooth phone connection, and dvd players in headrests??