Why does my Audi A1's engine make a rattling noise when idling?

I recently purchased a used Audi A1 and I've noticed that the engine makes a rattling noise when it's idling. It's not very loud, but it's definitely noticeable. Is this something I should be concerned about?

It's common for older Audi A1 models to make a rattling noise when idling due to wear and tear on the timing chain. It's not necessarily concerning, but it's important to have it checked by a mechanic to ensure it doesn't cause any further damage or affect performance.