I've got the power mirrors, loike fresh air, but this ones new to me...but
if I had the problem I'd play some with the position of the vent windows,
and if that didn't work, by some of those plexiglas type wind deflectors
from eurocampers.com - a business that started out of the vanagon list.

Tom F.
90 Syncro Westie
83.5 9 pax sunroof GL
02 Cooper S
91 Audi 200q20v Avant, seriously for sale
Thomas Forhan