Hi sepp,

Here is a little light reading for you on panel adjustment. http://www.autobodystore.com/ms1.shtml
It takes a lot of patience, and in my case required giving it a rest and coming back to it a few times.

There is available from the various suppliers a small shim that snaps onto the door latch. It helps with worn out latches and allows us to keep things original a little longer. Here is a picture from the American Classic site. http://americanclassic.com/images/DLRS60.JPG