I honestly don't know how to remove it - the system I was working on, was on an Audi. I do remember unbolting the distributor itself (there was a gasket, and a wavy washer, if memory serves correct). From there you can see where the plunger touches the other end of the arm that connects to the plate. When I would move the plunger is didn't drop right out, but slid out smoothly at a pace you would expect from a piece machined to close tolerances. (it would slide back in the same way.)
Sorry that this is all the help I can give.

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D