I haven't found a way to get into the car and play the radio or open the windows without first starting the car. I know I can shut it off while in "D," and it will have power, but is there a way to get power without starting the engine?

 

sit in the car with your foot NOT on the brake. Press the start button once than again. That will put it into auxiliary power. Then a third press turns it back off.

 

Thanks! That did it. At first, I just went out and tried it, but it didn't work. Then I realized that I didn't have the "key."

 

Awesome! Glad you got it to work!