The veihcle has a device that allows maximum ease of manoeuvring during parking; with reverse gear engaged, it indicates if the driver is approaching an obstacle that could be outside his field of vision, as illustrated in the diagram below.It operates according to the ultrasound sonar principle; four ultrasound transducers are located inside the rear bumper. They send signals to a control unit, which processes this information and determines the distance of possible obstacles.A loudspeaker controlled by the control unit emits an intermittent tone, proportional to the distance of the obstacle detected.The control unit is activated when reverse gear is engaged: under these conditions it energizes the transducers and prepares to receive signals from the sensors.The control unit emits a signal with an intermittent tone via the speaker with the frequency increasing as the rear of the vehicle approaches the obstacle. When the distance from the obstacle is less than 25 cm. the sound becomes acute and constant.If the distance measured from the obstacle increases or remains constant for 3 seconds (vehicle stationary) or reverse gear is engaged, the sound stops.