What I did to press the new pin into place was take the old pin plate and open the holes up a little bit to use it as my device to pry the new on and use some channel locks to press it into place. It worked very well.

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Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k