Use a pry bar! look  carefully at top of the cylinder, there is some tabs,
pry there! use the round shape part of the pry bar on the head.

Good luck
Ben
ps.: i may have many picture on my site that could help you, but i have no
time to go through those right now. look on that page, left, in the Engine
section... i have many heads pictures.
http://www.benplace.com/vw2.htm