No adjustment I'm aware of. Nor is there any reference to one in the workshop manual.
I had considered the possibility of a hydraulic problem although apart from taking up high, the pedal "feels" good. I haven't tried bleeding the hydraulics because:
1. The space around the slave clinder is very tight.
2. From memory, the manual suggests the clutch hydraulics cannot be bled with conventional means and that a pressure bleeder is required (which I don't own).
3. There is no reason for me to believe there is air in the system. Also, if there was I would have thought it would cause difficult clutch dissengagement.
Just the same, I'm appreciative of any ideas and open to all suggestions. Hopefully someone has struck a similar problem before. Thanks for the replies.
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.