Hi there, my 2014 s3 has a whistling noise when accelerating, around 1500 to 2000 rpm, the sound is a bit annoying but there is no loss of power, less whistle when car is hot. Also there is a bit fluttering sound as well. Please see the videos to see the noise. The fluttering sound is at 13 second. Any ideas is really appreciated. Thanks
Whistle:
Fluttering:
Whistle:
Fluttering: