This might be old news, but I wanted to confirm that some of these settings settings seem to work on my 2013 (no nav) 6-speaker stereo :
Hidden menu for 2011+ "premium" head unit? - NASIOC
I managed to change to "Pass through" mode for the flatter eq setting.
Hidden menu for 2011+ "premium" head unit? - NASIOC
I managed to change to "Pass through" mode for the flatter eq setting.