The vehicle is fitted with two gas discharge headlamps.The left lamp is the master control unit, whilst the right one performs a slave role.The master lamp acquires the command for the dipped headlamps, the vehicle speed and, for managing the function in question, the signals from two sensors (potentiometers) located on the wheel axles, which measure the geometry at the front and at the back.Depending on the inputs, the control unit controls the adjustment motor located in the headlamps directly and tilts it appropriately on the version with gas discharge headlamps the adjustment of the light beam takes place automatically and there are not the two buttons in the panel on the left hand side.The device is enabled only with the dipped beams on.The relay which controls the engagement of the dipped headlamps also supplies the adjustment motors inside the headlamps; this relay for switching the dipped headlamps on is managed by the Body Computer: relay energizing is activated by enablement signals with key in the ON position and by the steering column switch unit dipped headlamps control. See E2011 DIPPED HEADLAMPS