Need to really slam door to get it to latch
 

Any Ideas to help make a better latching on the two rear passenger doors? they had to be closed quite firmly to get it to latch completely. After someone backed into my rear passenger door (since been repaired) its even harder to close that side.
I have to really slam hard in order for it to latch. I feel like I could start causing more damage (perhaps to the window etc..) if it continues.
thanks for any ideas.

It might be time for new door strikers.
http://catalog.peachparts.com/ShopByVehicle.epc?q=&yearid=1982@@1982&makeid=63@@MERCEDES+BENZ@@X&modelid=6190%3AED%7C10000135%3AMB C%7C1504@@300D&catid=241766@@Body+Mechanical+%26+Trim&subcatid=241818@@Door+Striker+%2D+Front+Left&a pplicationid=W0133-1632135@@Door%20Striker%20-%20Front%20Left&mode=PA
Adjusting the existing door strikers might also help.

A little adjustment may help. Move the latch on the body frame out a little bit.

look for the little tab on the bottom side of the striker- compare against the others. Also, I've had good success using a dry lube on the door side bits and pieces.

Strikers are nearly free at the yards. Grab some extras when you go. Have you kept the hinges lubed? Are they out of adjustment?

How does one adjust the hinges?