in the 2012 if you hit the "on" button nothing will happen. you only get the green indicator light when you hit "set". when you hit the brake the light will go off, cruise control will still be on however, just not engaged. you can hit resume to take you back to your previous speed and the green light will come back on.
2012 v6 white, base, performance package, borla ATAKs, 4 alpine type s speakers, 35% tint