A few days ago I picked up my Phaeton from the workshop. Some problems were fixed, others persist. Therefore I can use some information about the following errors well so that I can tell the whistles what they have to do. 1. high frequency noise while driving, maximum volume at approx. 105 km/h, after that the noise is covered by the wind noise. It sounds like it comes from a rotating part. The manager (85 years old and half deaf) says nothing. The workshop master says the GF has driven with the car and has heard nothing. 2. From approx. 130 km/h comes another high frequency noise which only occurs when giving gas. Without pressure on the gas pedal this is not to be heard. In the other speed ranges also not. 3. Air conditioner whistles loudly when the front airflows are closed (manually closed) and the air conditioning system is on. When changing on a manual air stream the noise disappears. Sometimes it disappears even after a few minutes, sometimes it remains available for hours.