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The blades don't seam to want to relaease fro the arms & I dont want to break them
I believe it is a "shepherds hook design" that is released by squeezing the plastic clip at open end/bottom of hook and pulling blade down to release. If buy at parts stores then they usually replace at no charge and can show you.
Q&A > Mercedes-Benz > 1999 Mercedes-Benz ML430