How to Solve the Sunroof Noise Issue in Passat?

[StMargaret]

Passat sunroof noise causes and solutions: 1. The edge of the sunglass holder opening has clips that contact the buckle area of the holder, causing noise when driving over rough roads at speeds above 80 km/h. Solution: Use the thinnest semi-transparent double-sided tape to cover the switch clip area, then close the sunglass holder to ensure it snaps shut properly. 2. The honeycomb plastic parts of the sunroof pull panel may also produce noise. Solution: Purchase some soundproofing damping sheets for audio modifications online, cover the noise source with the damping sheets, and firmly press them onto the plastic parts of the sunroof pull panel to flatten them. 3. Noise from the sunroof area: There are gaps between two black plastic parts when the cover is fully closed. Insert a bank card into the gap; if vibration is detected, measure the width and cover the area with damping sheets accordingly.