Help! W126 Wipers

Hey guys... been pretty rainy here in FL for the past couple weeks, and unfortunately, my windshield wipers went stupid.

I pulled up the plastic covering under the windshield enough to get a look at the assembly, and turned the wipers on, the motor works, but the arm that moves the wipers is no longer attached to the motor. Maybe some sort of clip or something broke?

I couldn't figure out how to get the wipers off, so I couldn't get the plastic covering completely off the car... on my Cadillac STS the whole arm will just pull off with force; however, this is my first Mercedes-Benz and I don't know very much about them.

SO... if someone could explain to me or send me a link or something that explains how to fully remove the assembly to somehow re-attach this arm
I would be most grateful.

Shaun
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1987 420SEL "Big Frau"