Facing the headlight, turn the headlight wiper assembly towards you until it's almost touching the bumper. You will see a slot about 1/4 inch long in the little black plastic holding piece. insert a flat headed screw driver in the slot and gently pry the blade out. It will pop out. Pop in the new blade.

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Riadh
'89 560SL Rauchsilber
And what is good, Phaedrus, and what is not good -- Need we ask anyone to tell us these things?