A hands-free phone and multimedia device for automotive vehicle, comprising: a) a pilot box comprising: • a digital processor for processing signals and for controlling the device; and, coupled to this processor: • a display screen for displaying information; and • means for applying user commands, b) an offset box, distinct from the pilot box, adapted to be mounted in the vehicle, remote from the pilot box, and comprising: • an audio amplifier adapted to be connected to a loudspeaker arranged in the passenger compartment of the vehicle; and • a power supply, adapted to be connected to the on-board electrical system of the vehicle and to directly power the circuits of the offset box, and c) a link for coupling the pilot box to the offset box, said device being characterized in that: - the coupling link is a wire link, consisted of a bidirectional digital bus adapted to convey concurrently digital signals and power supply currents; - the pilot box is a box adapted to be removably fastened to the dashboard of the vehicle, near the driver; - the pilot box further comprises: • means for wireless coupling to a remote phone, for the remote piloting of the functions of this phone; and • an interface coupling the processor to the digital bus of the coupling link; - the pilot box have no proper electrical power supply and is indirectly powered by the offset box power supply, via the digital bus; - the offset box has no digital processing microcontroller circuit; and - the offset box further comprises: • an audio codec coupling the digital bus to the audio amplifier; • a connection system (38, 50, 58, 60, 64) for connecting the wire link to a plurality of peripheral units (40, 42, 44, 62, 68, 72) of the device; and • means for the common coupling of all said peripheral units to the pilot box via the digital bus. a) a pilot box comprising: • a digital processor for processing signals and for controlling the device; and, coupled to this processor: • a display screen for displaying information; and • means for applying user commands, • a digital processor for processing signals and for controlling the device; • a display screen for displaying information; and • means for applying user commands, b) an offset box, distinct from the pilot box, adapted to be mounted in the vehicle, remote from the pilot box, and comprising: • an audio amplifier adapted to be connected to a loudspeaker arranged in the passenger compartment of the vehicle; and • a power supply, adapted to be connected to the on-board electrical system of the vehicle and to directly power the circuits of the offset box, and • an audio amplifier adapted to be connected to a loudspeaker arranged in the passenger compartment of the vehicle; and • a power supply, adapted to be connected to the on-board electrical system of the vehicle and to directly power the circuits of the offset box, and c) a link for coupling the pilot box to the offset box, - the coupling link is a wire link, consisted of a bidirectional digital bus adapted to convey concurrently digital signals and power supply currents; - the pilot box is a box adapted to be removably fastened to the dashboard of the vehicle, near the driver; - the pilot box further comprises: • means for wireless coupling to a remote phone, for the remote piloting of the functions of this phone; and • an interface coupling the processor to the digital bus of the coupling link; • means for wireless coupling to a remote phone, for the remote piloting of the functions of this phone; and • an interface coupling the processor to the digital bus of the coupling link; - the pilot box have no proper electrical power supply and is indirectly powered by the offset box power supply, via the digital bus; - the offset box has no digital processing microcontroller circuit; and - the offset box further comprises: • an audio codec coupling the digital bus to the audio amplifier; • a connection system (38, 50, 58, 60, 64) for connecting the wire link to a plurality of peripheral units (40, 42, 44, 62, 68, 72) of the device; and • means for the common coupling of all said peripheral units to the pilot box via the digital bus. • an audio codec coupling the digital bus to the audio amplifier; • a connection system (38, 50, 58, 60, 64) for connecting the wire link to a plurality of peripheral units (40, 42, 44, 62, 68, 72) of the device; and • means for the common coupling of all said peripheral units to the pilot box via the digital bus.