We bought this car from Car max and it was a rental car previously. I believe the sub is missing and I'm assuming an amp. what is the best way to replace these other than going to the dealership? also being that we have the 2012, the stereo doesn't have all the my link stuff or navigation to go with it. I have heard of people adding the navigation to the existing stereo at a reasonable cost. does anyone know about this? The last question is can i get my Bluetooth to pick up my music to play from my phone because as it is right now i can only use my phone through Bluetooth. how can i change this? Any help would be appreciated thanks!