Why is my Audi A2's engine making a ticking noise while idling?

I purchased a used Audi A2 last month and recently noticed that the engine makes a ticking noise while idling. It seems to go away once I start driving, but I'm concerned that there may be an underlying issue. Can anyone provide insight on what could be causing this noise?

It is possible that the ticking noise is coming from a faulty valve or lifter in your engine. You should have a mechanic inspect it to determine the exact cause.

My Audi A2 also had a similar issue. It turned out to be a loose spark plug causing the ticking noise. Have a mechanic check your spark plugs and tighten them if needed.

I've heard that sometimes a ticking noise can be a result of a low oil level. Check your oil and top it off if necessary.