I verified that the throwout arm/fork is intact--not cracked or bent--and is riding on the ball as it is supposed to.

Another thought is that somehow the clutch disk got binded on the splines of the transmission input shaft, either because of a burr or because something expanded and jammed after heating up following use. I note that I did not put even a small daub of grease on the splines, so I have to consider either of these a plausible explanation. Any other thoughts?

Anyway, before starting the engine and driving the car again I pumped the clutch 100 times. No problem. I drove it twice for some time around the neighborhood with much shifting. So far, so good. I am cautious so I am not yet ready to declare victory.

This particular ponton model does not have a transmission mount. The motor mounts appear in decent condition and anyway this clutch adjustment problem was not present before the new clutch job.

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Douglas
1959 M-B 220S cabriolet