Why does my Audi A5 make a loud whistling noise while accelerating?

I recently noticed a loud whistling noise coming from my Audi A5 whenever I accelerate. What could be causing this and how can I fix it?

The whistling noise could be caused by a leak in the intake manifold. I recommend getting it checked by a mechanic to prevent any further damage.

Another possible cause could be a faulty turbocharger. If this is the case, it's important to get it replaced as soon as possible to avoid engine damage.