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A few weeks ago, I started hearing excessive wind noise above 50 mph or so from the pano roof of my 2019 E450 coupe. I had read that sometimes the edge of the glass panel or the rubber roof seals get dirty and cause a gap into which wind can infiltrate, so I gave both a thorough clean. I noticed that the noise seemed to be coming from the passenger side but I cleaned all around the panel and both seals to no avail. Needless to say, this was very frustrating on a $75K car, but I didn't want to go to the dealership to learn this was a multi $K repair.
This past weekend, I was searching the Internet (including MBWorld) for a solution, and one of the YouTubers said he adjusted a pano roof bracket on what appeared to be a W204 C sedan. Ironically, rather than an air leak, the noise was caused by the slight elevation of the leading edge of the pano roof panel, as I never felt any air infiltration when I reached over to the passenger side roof while driving. Although my E450 is a completely different car and the roof is configured differently, I also noticed that the leading edge of the right side of my pano glass was also very slightly raised from the roof of the car. BTW, because my wife's E300 sedan has a true two-segment panoramic roof, the mounting system is also completely different.
That said, I opened the panoramic roof fully and saw a Y-shaped bracket with two T-25 screws that connected the roof to the track (left side pictured below). I compared the right-side bracket with the left side and saw an approximately 1/8" gap between the top of the screw heads and the opening, where the left side screws were flush with the opening, as shown in the photo. The leading edge of the panel was also flush with the left side of the roof. I then loosened the two screws, pushed the glass panel down to close the gap, retightened the screws, and went for a five-mile, 60 mph test drive. Problem solved - no unusual wind noise, and it was an easy fix, so I hope my experience helps any other E coupe owners who are experiencing the same issue.
Last edited by SidE2; Apr 30, 2025 at 03:29 PM.
Reason: Replaced photo, provided more details
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