You have to set the climate control up for the settings you want in the morning before you shut off the car. The timer will not turn on the system, it just provides power to it. In the winter, I am going to put it in auto and crank the temp up to 90 just before I turn off the car and plug it in. That way it's good and warm in there for my commute! Another interesting thing to note is that if you program your charge timer to turn off before the climate control timer, and if you program the charger to turn off at 80 percent, your car will charge past 80 percent because the climate control timer also provides power to charger as well. All this info is for the s model. I'm not sure how the sv and sl work.