How can I fix the automatic headlights on my Audi A2?

I've noticed that the automatic headlights on my Audi A2 are not working properly. They are not turning on when it starts to get dark, but will turn on when I manually switch them on. I'm not sure what the issue could be, any suggestions?

First, make sure that the automatic headlights are enabled in your Audi A2's settings. If this is not the issue, it could be a faulty sensor. Try cleaning the sensor and see if that solves the problem.