The original door lock on my 2005 5230 is hard to open if the door is not shut very gently. Even then it can be too difficult for my wife to deal with. Can I do anything to fix it. For example, I am thinking of removing the three inside screws, and seeing whether I can get at the working parts to lubricate them. I am considering replacement, but do not see a brand name or number anywhere. The door jamb hardware looks like it is attached in such a way that any replacement would require...
