When we bought the Range Rover there was a strange looking fob accompanying the spare key. After poring over the Owners Manual it appeared to be a remote control that would activate the car's heater on a cold morning allowing one to pre-heat the car.
This was obviously piqued my interest but was of minimal value when we bought the thing in the middle of the Summer. Well, on Saturday morning we had a hard frost and 30% and I needed to be in Stratford early. As I was pottering about the house I looked out and noticed that the car was heavily frosted. I recalled the magic heater fob and retrieved it from the drawer. I peeped out of the door and pressed the button and was rewarded by a humming noise coming from the car. I retreated and let it do it's thing.
About twenty minutes later I noticed that the windows had defrosted nicely and ten minutes after that we exited The Pile for our trip in to town …
… that has got to be the best gadget EVER. The car was beautifully warm and the windows were frost free. There was no need to faff about with ice scrapers or waiting for heated windows to defrost. Simply remember to hit the button half an hour before you plan to leave and you are rewarded with a car as cozy as the house you just left.