Hello together, since a few days I miss the turbo whistle and have a sound, similar to the whistling of wind around a hut. Also when giving gas in the stand with open door it sounds somehow like hissing anakonda. In driving mode until about 2000, then it disappears and in the steps 2 and 3 of the Tiptronic you can then feel a slight jerk (pos acceleration) but only very weak. In the past the typical turbo whistle was to be heard, that is missing now. ht, not noticeably less and since winter tires (T) I can not check the tip. Loader? Connector? Charging air cooler? Magic? Voodoo? Someone’s idea? Motor is an AFB re