I am picking up my new 4Runner tonight and just wanted to be clear on something. If I put my ipod in the glove box and hook it up with the usb connection, I can control through the steering wheel/head unit? If i leave it in there with the car off, will it drain the car battery/ipod battery? Does it charge the ipod battery when the car is started? Basically I can put it in there and forget about it?