invention will now be described essentially within the context of one particular embodiment of a system according to the invention in which actuators which are coupled to the headlamps are provided for adjusting the tilt angle of said headlamps as shown in fig2 the actuator control device according to the invention which is denoted as a whole by reference 5 is connected to the actuators 1 d and 1 g of the headlamps not shown and receives at the input a setpoint information item cd as will emerge more clearly below the setpoint information item cd supplied to the actuator control device according to the invention may be in different forms for example in the form of a dc voltage with a level which is representative of the setpoint information item cd a pulse width modulated pwm signal a digital data item or the like in this embodiment the actuators 1 d and 1 g are analogous to those described above with reference to fig1 a and 1b and thus will not be described again in detail here however it will be noted that the invention applies both to actuators with direct control of the motor and to actuators with slaved control of the motor moreover the actuators 1 d and 1 g each comprise a motor control circuit 12 u2033 suitable for connection to the actuator control device 5 according to the invention the circuit 12 u2033 comprises means for receiving an actuator control transmission signal sca provided by the device 5 and for supplying power to the motor 10 so as to obtain the tilt angle corresponding to the adjustment information item contained in the signal sca the circuit 12 u2033 will not be described in.