How to activate rain sensor on Audi A4?

The rain sensor on my Audi A4 doesn't seem to be working. How do I activate it?

To activate the rain sensor on your Audi A4, simply press the lever towards the windshield and release it. The sensor will then automatically detect and adjust the wiper speed according to the amount of rain.

First, make sure that the rain sensor is turned on in your car's settings menu. Then, check for any debris or dirt on the sensor as this can interfere with its functioning. If the problem persists, it may be a faulty sensor and you should take your car to a certified mechanic.