The vehicle is equipped with a device that allows easy manoeuvring whilst parking: when reverse gear is engaged, it signals to the driver that an obstacle, which may be outside of the range of vision, is being approached.It works on a sonar ultrasound principle; four ultrasound transducers are located inside the rear bumper.They send signals to a control unit which processes this information determining the distance of possible obstacles.A speaker controlled by the control unit emits an intermittent sound, proportional to the distance of the obstacle detected.The control unit is activated with reverse gear engaged: in these conditions the transducers are energized and prepared to receive the signals from the sensors.The control unit produces a signal with intermittent tone via the speaker and the frequency increases as the rear of the vehicle gets closer to the obstacle.When the distance from the obstacle goes below 25 cm, the sound becomes high-pitched and constant.If the distance measured from the obstacle increases or remains constant for 3 seconds (vehicle stationary) or reverse gear is disengaged, the sound stops.