Why is my Audi engine making a strange noise?

I've noticed a strange noise coming from my Audi's engine recently. What could be causing it and what should I do about it?

I would recommend taking your Audi to a certified mechanic as soon as possible. It could be a minor issue, like a loose belt, but it's always better to get it checked out to avoid any potential problems.

It could be a problem with the exhaust system or a faulty engine component. It's best to get it looked at by a professional to determine the exact cause and prevent any further damage.

Have you recently changed the type of fuel you use in your Audi? Different fuel types can sometimes cause a change in engine noise. If not, I would suggest scheduling an appointment with your Audi dealership for a diagnosis.