$%^& Actually I got the old seals and pistons out, but when I reassembled them with the new seals, I didnt get either Dust Boot to sit perfectly in the ridge that lies underneath the caliper top. One had about 1/4" sticking out and the other about 1" sticking out.

So to them right, I tried removing the pistons again. They wont budge. I even resorted to sticking (CRINGE) vise grips on them and trying to tap them out. Now i have serrated outer edges.I soaked them in brake fluid for an hour to see if that would loosen them up...no luck.
I know the obvious thing to do is to pump them out using the cars hydraulic system, but i am a little nervous since I have ABS and dont know what this migh do the accumulator when they finally "Pop"

Is there an obvious soultion I am overlooking? WD 40? Finally how much psi is brake pressure? I might be able to jury rig up something with my air compressor....

Finally why doesnt some one ever machine a threaded hole in the piston bottoms so a bolt can be screwed in and used with a impact puller or something...This is Mercedes, after all....

I was browsing my FSM the other night thinking about installing my new pads on my 240.....and was shocked to see a puller made for pulling the pads out...will find picture if no one speaks up with suggestions...
Did you use the bleeder screw to allow you to depress the pistons enough?

on my air gun and they came out like cannonballs. The Rubber Tip IS THE DIFFERENCE

Keeping your fingers out from between them at that time makes a big difference too...... LOL