Like in other projects from me, I want to show you an idea how to use old electrical devices. Here I've used a old hairdryer to pre-heat my car in the winter days.
Therefore I've stripped up a old hairdryer and applied it to my car. A extension cord then reaches for the garage, where a timed power plug is located. Then the timer turns on the hairdryer for 5 min.
I don't heat up my complete car, I mainly heat up my windshield to prevent mist over when I'm sitting in my car.