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The bars are stout, but you'll bend the S*** out of them if you try to hammer those pins in situ. You'll have to undo the ends (the 'driving arms') of the headlamp shaft off and out of the car. They are in _really_ tight, you'll have to drive them out with a drift and a BFH, supported on a vise or something solid.
Undo the two pairs of M6 bolts that hold the driving arms to the central shaft, then loosen the two bolts that hold the elliptical 'bearing' where the shafts pass through the body, and take out the driving arms completely. Then you can work on them on the bench.
Now realize I had completely misinterpreted how this is configured; should've looked more carefully at PET. It was there I just couldn't see it until reading your explanation.
BTW, thanks Jim. I've not yet used a press so that didn't even enter my mind. I may have accomplished what I needed already but if I continue on with the pins I'll consider that.