It's remote start....the "C" has an arrow on it and it's to symbolize "turning the car over" or ON to those who don't know what that is.
Also, why would remote start be illegal in some states. To my knowledge, the only factory remote starting cars also shut off the engine as soon as you hit one of the pedals....which is required to get it into gear.
Love the pics and thanks for posting them! Can't wait to get a pic of me in one!
Two more thoughts:
1. The button on the door is for the trunk because it shows a little car with it's trunk open...if it was for the fuel door it would probably just be a pic of a fuel pump.
2. I'm not sure about the door locks being in the center of the car....what if you're standing at the drivers door and you want to unlock the door for a passenger....your options are to pull your key fob out again and push it twice or get in the car and push the button. I have a key fob for my truck...and even though it opens both doors I still use the button on the door quite often to open the other...and i'm not always sitting in it when I do it.
Just some thoughts.