Hello,
Glad to read that you got the car going without tearing into it, I did not have such good fortune today. My W115s' slave cylinder(only 1.5 years old) gave up in dramatic fashion just 300 metres from *my* current indie's shop.
I was actually going there to have the rear bumper mounting rewelded after some dim wit had run into the car last night when it was parked, tearing off the right rear mount. After the repair, I drove off, only to have the pedal drop almost to the floor and no clutch. I had to stall at the first junction, then restart in gear and grind back to the shop in second.
The slave was rusty along the outer edge of the dustcover, I was in a hurry, so we replaced the seal only and reused the rest of the stuff after carefull cleaning.
I think that the *new* part I bought 1.5 years ago probably sat on the shelf for many years as almost ALL the surviving Mercs here are automatics as well AND Malaysians have *modified* many of the older cars to auto, with either Mercedes drivetrain or Nissan 200SX engine/auto trans combos!
Have a good week.

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Nachi11744