I made the measuring gauge tool according to the dimensions in my Haynes W201 manual, my Haynes W124 manual and my Brooklands W124 manual. The dimensions in all the manuals agree. Unfortunately, none of my factory manuals (MB North America, W201, W124, M103, M104 but I don't have M102) depict the tool for a comparison. Without those manuals at hand at the moment I cannot quote the dimensions but if anyone is interested I will look them up again and post here. The tool seems to fit perfectly. I can feel it sliding onto the slave cylinder push rod.
107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership).
107.026: 500SLC, 4-speed auto, thistle green, green velour.
124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex.
201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex.
201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather.