Bama1 is right; my message was misleading. (one adult beverage too many on a Sat. night.)
I ran a bead between the glass and the gasket, not between the body and the gasket. I had visible evidence that my leak was there.
My gasket was new (1 year), this should not be done if the gasket is questionable. It won't help.
There is also a lot of info here on compatible sealants, and MB has their own stuff. I have dried out my interior only after lots of trial and error, and despite the advice of some who have replaced their gasket and fixed their leaks, that wasn't enough for my wagon.
My plan is to replace my aging windshield within the year ( another new gasket as well); this was a stop gap measure to keep my carpet padding from icing this winter!
Thanks again bama1, for your polite rebuttal!