Why is my Audi A4 engine making a strange tapping noise?

I've noticed my Audi A4's engine has started making a strange tapping noise. What could be causing this? Should I be worried?

It's important to get your car checked by a certified mechanic as soon as possible, as this tapping noise could indicate a serious issue with your engine. It could be a sign of low oil pressure or worn out engine components. Don't wait too long, as ignoring this noise could lead to expensive repairs in the future.