Another obscure part for the W111. Attached is a template to make the covers that fit onto the seat slides in the rear (as seen by back seat passengers). Most of the time, these are thrown off whenever a seat is removed never to be found again. I had to make my own since these are long gone. I used a set from a W108 to start. They are different, but can be used to get an idea of how it works. The W108 pieces are plastic and usually covered in vinyl or what ever the seat was. The W111s were covered in seat leather. I am not sure when they started or ended the use of the covers, but they can be seen on EPC. There are (4) part numbers - 108 919 (09,10,19,20) 20.
The attached will work for all four, you just have to reverse one set to fit. I made mine out of this sheet metal because it was easier for me. Once I get these covered in leather, I will post what they look like.