Why does my Audi A5 make a strange noise after driving it for a while?

I've noticed that after driving my Audi A5 for about 20 minutes, it starts making a high-pitched whirring noise. It doesn't affect the performance of the car, but it's a bit concerning. I want to make sure it's nothing serious.

This noise is likely coming from your engine's cooling fan. It's a normal sound and nothing to worry about. However, if the noise gets excessively loud or the fan stops working, it may be a sign of a larger issue. In that case, it's best to take your car to a mechanic for a checkup.