DanielW- be sure to check with the dealer parts list before you order these... there are many parts on the parts drawing and several are listed as "screw covers"... I'm not 100% positive that they are the correct items as you describe them.
Bottom line is the dealer should be able to call up the same diagram (Group 72-200) and you can see for yourself. But, it looks like every part in the door trim panel has a separate part number... so, I suspect you can order the part you need.
If the dealer is no help, let me know and I'll send you a scan of the exploded diagram from the MB manual.

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KenP

1996 S500 W140 Coupe