What is the foot-sensing trunk feature of the Audi A4L?

[StLucille]

Audi A4L's sensor-activated trunk is equipped with sensors under the rear trunk, allowing the trunk to be opened or closed through sensing. Simply wave your foot under the sensor to open the trunk. Opening method: By sweeping your foot under the sensor located at the lower edge of the rear bumper, the rear door of the Audi A4L's sensor-activated trunk will automatically open. Below are the basic working principles of the sensor-activated trunk: 1. When a person approaches the rear of the car, lifting and retracting the leg near the middle of the rear bumper is detected by the upper sensor recognizing the calf movement and the lower sensor recognizing the foot movement. 2. After the electronic analysis device determines a valid foot movement, it communicates with the key accessory. Upon successful communication, the car trunk will open.