I have to really slam all four doors on my 79 240D to get them to latch. There is a male on the door and a female on the door jam. Just below the female is a little insert that is badly worn. This insert is what trips the latching mechanism. MB does not sell the insert separately but as part of a $76 unit. I am not inclined to sink $304 + 6% tax on closing my doors. Does anybody know if these inserts are available somewhere or should I fashion something myself? Anybody out there ever do this?