hello,
check out the following excellent thread:
http://www.peachparts.com/shopforum/restoration-projects-long-term-builds/341121-achtung-das-schweinhund-baby-benz-thread-38.html
monowiper info starts from post #570.
my 2cents:
i managed to do the job without the puller, used a wooden block and hammer instead.
and like stretch mentions in the thread, make sure you dont lose the metal shims, they are super thin and can easily wind up getting lost if you are not careful.
Ps. i did this job over the summer, and still have a pretty good idea how it went, so if you have any trouble removing the wiper feel free to PM me.
good luck