2017 Macan S. Whistle-like sound
 

I just noticed that when I start the engine everything seems fine, but after the engine warms up and I am on idle, you hear a whistle-like sound coming from the engine compartment, if I hit the accelerator it stops but once I let go it comes back again. Has anyone experienced this before? Any help will be appreciated since this is really annoying. Thanks in advance.

Check you belt, maybe worn.

Could also be oil separator diaphragm. Common issue.