I have them in my garage. Give me a minute.
No, I had the ones from SLS, sorry. That is because at SLS they had full set of parts, at MB just the top.
I will order them from MB too, see if it is DOT and 17mm (I would be surprised).
The push button A 000 988 84 81 (the PN changed from A 136 988 09 81).
The window (which is, obviously a washer, similar German word for both) A 111 990 10 40 is NLA. This may be the floor piece, actually.
Not sure what you mean by a "stud", but if it is what they call a knob, PN A 000 988 14 80 - 6 needed for RHD cars. 7 for LHD cars - they are not for 113044, they are for 230 and 250 SL only (rubber mats?). I think neelyrc showed that bottom part of snap with the washer was screwed to the floor.
Then 2pcs of N 007981 003214 TAPPING SCREW (SRUBA DO BLACHY) B3,9X9,5
Then 4pcs of N 007981 003240 TAPPING SCREW replaced by N 007981 003207 TAPPING SCREW (SRUBA DO BLACHY)
When I was making my tool bag, the gentleman who made it said that DOT snaps (I asked specifically for them for my tool bag) are normally available in upholstery stores (he was from the US).