This is for cars with factory installed rear sensors.
It upgrades the standard parking sensors to The Audi Front and Rear Optical Parking Sensors also known as ‘Audi Parking Systems Plus’.
This Advanced Parking System provides all-round assistance when parking the car. As soon as the distance to an obstacle at the front or rear is closer than a preset minimum, an audible tone as well as a graphical illustration on the MMI Screen provides a warning. The closer you get to an obstacle the faster the tone sounds until you’re less than 25cm away, where the tone becomes continuous. The system is activated automatically when obstacle is detected* or when reverse gear is engaged..