The device for controlling headlights of a vehicle includes respective adjusting units (20) for adjusting the headlights to vary light widths of the headlights (10); a first sensor unit (24) for measuring a first angular orientation of a first mounting plane of the first sensor unit (24) mounted on a first link element pivotally connected between at least one front wheel and the vehicle body (12); a second sensor unit (28) for measuring a second angular orientation of a second mounting plane of the second sensor unit (28) mounted on a second link element (40,50,60) pivotally connected between at least one rear wheel and the vehicle body (12); a third sensor unit (30) for measuring a third angular orientation of a third mounting plane extending in and fixed in relation to the vehicle body (12); and an evaluating unit (32) for controlling the adjusting units to adjust the light widths of the headlights (10) according to the first, second and third angular orientation measured by the sensor units.