Same thing happened to me with one door on my '79. I replaced the entire female striker plate with junk yard part, 5mm allen socket you need to do the job. The old ones have white nylon inserts, later MB went to black nylon - dont know why. But I doubt the nylon bits are even removable from the female striker plates. You can have the entire set of female door clasps that appear to be working fine from my parts car..... How does $45 for the complete set of 4 that includes shipping and handling sound?