Why is my Audi A2 making a clicking noise when I turn it off?

I've noticed that every time I turn off my Audi A2, there's a strange clicking noise coming from the engine. It doesn't seem to affect the performance of the car, but I'm still concerned. Is this something I should be worried about? What could be causing this noise?

This clicking noise is most likely just the sound of the fuel injectors shutting off. It's a normal sound and nothing to be concerned about. However, if the noise becomes louder or more frequent, it could be a sign of a more serious issue. I recommend bringing your car to a mechanic for a thorough inspection if you're worried.