That was my suggestion in Permalink#15, but in reference to the A-pillar.
I've transitioned from a Superbeetle to a VW Dasher. The external rain gutter on the Superbeetle is very similar to the Mercury. The Dasher has very much less wind noise with the driver window down, but I attribute it to the flush glass.
I think the rounded leading edge of the B-pillar causes buffeting.
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