How do you keep the car turned off while sitting inside? I used the screen to turn it off from the safety & security menu but it keeps powering back on when I'm not even using the brake pedals or opening a door. It also just threw a "Service Is Needed" error message while I'm sitting inside waiting for the kids. This is very annoying when I'm trying to make a call without using bluetooth. I just want to shut the car off and make a call in privacy. Please help!