The DVD option is pretty expensive, over here in the UK its around £5300 so you very rarely see cars for sale with it fitted.
From what I know of other marques, there is a sensor connected to the handbrake which allows the front screen to work. These shops simply disconnect it so the front screen will work on the move.
From what I know of other marques, there is a sensor connected to the handbrake which allows the front screen to work. These shops simply disconnect it so the front screen will work on the move.