I was trying to do the simple task of replacing the front brake pads on my '82 300 TD wagon. I was able easily able to get one of the pads out, but the other one, the one closest to the car, I was unable to get out. When I would try to push the current brake pad back into the caliper to make room for the new thicker pad, it seemed like the pad was frozen in place. It would not budge. I tried tappiing on it with a hammer, blasting it with dynamite and it would not move. Is there something that I am missing, or does this mean I probably need to get a new set of front calipers?