Hattie,
The 123 is the same way. Some say you shouldn't use the sealant as the gasket should seal itself. The way I figure it MB never intended water to even get into that channel. On my 123 there is a small hole in the channel that would drain into the trunk, about 1/4" in diameter. Someone told me the hole was there to drain paint, like when the car was painted at the factory. That didn't make sense to me. I used the MB sealant to seal or glue the rubber gasket to the body right at the lip of the rubber seal. Its pretty difficult to get just enough to seal but not enough to have it squish out but it can be done. Make sure you seal the glass/rubber as well from the outside. The way I did mine no way is water going to get into the channel. It doesn't and hasn't and I do check the drain hole periodically to make sure. Hope this helps, RT

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