I am sad to report that despite the sunroof tray being clean, having no rust, and having clean drain hoses wasn't enough to keep the sunroof from leaking again. It appears the sunroof trays on the W126 are far too shallow, and the path which water has to flow is too narrow for water to drain into the hoses rapidly enough.

Water drips from the very front of the sunroof. When I pour water into the front center of the tray, it overflows over the edge before the water can drain to the area where the hoses are.

All I can think to do is maybe cutting off part of the metal sunroof deflector bracket perches and grinding away at the plastic deflector brackets so the water can drain faster, as Mercedes couldn't get it right on such an expensive car, while previous chassis were adequate. I guess it's another example of newer cars not always being better.

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DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles