Front parking assistance is an excellent system that warns of obstructions when you have limited space in front of the car, e.g. with tight parking. Car must have rear park assist already or be ordered with rear PA.
The system is activated when speed is less than 15 km/h (9.3 mph). A signal indicates the distance to objects in front of the car. When an object is indicated, the volume of the radio/stereo is lowered and a pulsating "buzzer tone" is heard from the car's front speakers. The tone starts when the obstruction is about 80 cm (31.5 in) away and increases to a continuous tone when the distance is approx. 30 cm (11.8 in) away from the front bumper.
In order to differentiate between the front and rear systems, different tone frequencies are used and the sound comes from different speakers, front or rear.
The kit consists of wiring and four sensors mounted in the front. Parking assistance can be disabled in traffic jams or the like by pressing the button in the centre console.
This system can produce "false" signals as a reaction to external sound sources with the same frequency as the system's sensors. Typical sources are the horn, wet tires on asphalt, air brakes and motorcycle exhaust pipes.