How to troubleshoot unusual engine noise in Audi A3?

My Audi A3 has been making a strange noise while idling and driving. I am not sure if it could be an engine problem or something else. How can I troubleshoot this issue?

First, you should check your engine oil level and condition. Low or dirty oil can cause unusual engine noise. It's also recommended to take it to a certified mechanic for a proper diagnostic test.

Another possible cause for unusual engine noise could be faulty spark plugs. It's important to have them checked and replaced if needed to ensure smooth engine functioning.