You can't touch this. Keep your new SEAT Leon away from obstacles. The parking sensors warn you of obstacles proximity even when they are out of sight.   Reference - 2 sensors: 1P1054752 Reference - 4 sensors: 1P1054753 Activated when the vehicle is put in reverse gear, acoustic signal is activated when object is within a distance of 160 cm. The acoustic frequency progressively increases up until a distance of 30 cm.   Reference: 000054753 Activated when the vehicle is put in reverse gear, acoustic signal is activated when object is within a distance of 160 cm. The acoustic frequency progressively increases up until a distance of 30 cm.