"Immobilizer" sure sounds imposing! This device, to help keep the Model S from being stolen, is a mandatory requirement by Transport Canada. On the Roadster, it was implemented by requiring the middle button on the key fob to be pressed after starting the car. One of the great features of the Model S is that, with the key fob in your pocket, the car will open and after you sit in the driver's seat, it is ready to go (no Start button required). Are we in Canada going to have to press some button on the key fob to deactivate the Immobilzer or does the key fob automatically authenticate itself to the car? If we have to do some manual step, that would be a nuisance. Does anyone know if we will have to do something to "start" our Canadian cars?