On page 75.4 of my Bentley, there is a photo and a snippet of text
that may help.  It says "If necessary, realign roof by moving rear
linkages in erongated (sic) holes and tighten bolts.  I think you
should be able to loosen the bolts (maybe just enough to allow
movement under pressure) close the top to its normal position, then
gently raise the top and tighten the bolts.  Perhaps if you put a dab
of grease at the edge of the hinge base, you will see how far it moves
when the top is properly positioned.

--
Michael Snow
1982 Westfalia 1.9TD
http://slowmachine82.blogspot.com/