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Quick question...I have recently started to notice an air deflating sound, like something is bogging down, if I press the gas in Comfort mode and release it quickly, without the car shifting gears.
It sounds like it's coming from the front left side, I thought it might be the intake, but that's on the right.
It doesn't happen in Dynamic mode when the exhaust is open at all.
The car has 2,400km on it and I started noticing it after 1,500 or so, not when I first got the car.

Did anybody else notice it?

Turbos releasing pressure? I can't say I've heard it in mine, but the recirc valve will operate when you lift off, or between gear changes.

It could be, it's a very deep sound...the only reason why I am mentioning it is that I didn't notice it at first...

I am going to the dealer to pick up winter wheel/tire package on Tuesday so I will do a quick test drive with a service guy to see if there's something wrong...

I have the exact same noise and noticed it now after 1900 miles. I think its the pressure being released as it happens on throttle lift off.

Let me know how you get on.

Yes, only on throttle lift off without full throttle.
Glad I am not the only one.