I have set up my Phev to defrost 20 min. before needing to use the car in the morning. However, I wonder what is most effective; Heat or Defrost? We still have -5 degrees morning temperatures, and snow and ice on the car in the morning... What I want to accomplish is a warm car in the morning, without the need to scrape ice and have the motor turn on when starting to drive. Is there a way to have it do both?