What are the reasons for the small sunroof leakage in the Audi A6L?

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The reasons for the small sunroof leakage in the Audi A6L are threefold: blockage of the sunroof drainage holes, improper sealing between the sunroof and the sealing strip, and aging of the sealing strip. Blockage of the sunroof drainage holes: Solution: First, check if there is any dirt such as dust, leaves, or small twigs in the sunroof drainage holes. If the drainage holes are blocked, clearing them should resolve the issue. The drainage holes are typically located at both ends of the guide channels on either side of the sunroof. Improper sealing between the sunroof and the sealing strip: Solution: Inspect whether the sunroof and the sealing strip are properly sealed. If not, press the sealing strip firmly with your hand during reattachment to ensure a tight seal. If you prefer not to do it manually, you can also visit a 4S shop for assistance. Aging of the sealing strip: Solution: Use a new sealing strip and adhesive to reseal the sunroof. Carefully remove the old sealing strip along its track, then clean the area with a cloth. Apply the adhesive along the edge of the sunroof, then attach the new sealing strip along the track of the sunroof edge.