Why is the engine of the Audi A2 making a strange noise?

I recently purchased an Audi A2 from a used car dealer and noticed that the engine makes a loud and unusual noise. At first, it was only when starting the car but now it continues while driving. I'm concerned about potential damage or safety concerns. What could be causing this noise and what should I do?

The strange noise from your Audi A2's engine could be caused by a variety of issues. It's important to get it checked by a professional mechanic as soon as possible to avoid potential damage to your vehicle. A common cause for engine noises is a problem with the valve train, which controls the opening and closing of the valves in the engine. This can lead to a ticking or tapping noise, and if left untreated, can cause serious damage to the engine.