Motor vehicle display device

The vehicle has an electronic system (20) providing information representing speed of the vehicle, and a communication unit (26) allowing the system to communicate with an electronic device e.g. personal digital assistant (PDA) (24), which is arranged on a support (22). The PDA is movable with respect to the vehicle. The unit is adapted for sending the information to the PDA for displaying the information on a screen (52) of the PDA.