Why does my Audi A2 engine make a ticking noise?

I recently noticed that my Audi A2 engine makes a ticking noise when it's idling. It's not very loud, but it's noticeable. What could be causing this and should I be worried?

It's not uncommon for Audi A2 engines to make a ticking noise. It could be caused by a number of factors, such as a worn out camshaft or a faulty valve. It's best to take your car to a mechanic to get it checked out, as it could potentially lead to bigger problems if left unchecked.