My car has a Sat Nag, but it is "old" technology . There is no turn off button, it starts as soon as the car does. It has a glitch in the soft ware, namely it sometimes gets LEFT and Right confused. No big deal the car has a large fuel tank...… The warranty has long expired. That went with the "FOR BETTER OR FOR WORSE" acceptance thing. Ah well I did get to see a lot of the country, in a bonus type of way.