Be really sure that you have positioned the pad in properly, maybe use a hammer to lightly tap it in place then try. Careful about sanding or grinding it down, the brake dust is supposed to be harmful esp. if it has asbestos
2000 C230 Kompressor
1988 190e 2.3 - 225K miles, owned for 7 years. I cannot say enough good things about this car. Very well built, even at 225 it ran like new.