2006 A3 2.0t fsi.
I’ve got a strange hissing noise in the car, it only happens when I’m in gear and when I’m not touching any pedals.
As soon as I touch the accelerator, even a tiny bit, it disappears and when I press the clutch in fully it disappears.
I don’t hear the noise when I’m in neutral or going below 10mph
Any ideas? I’m baffled?