Did you ever get it bled so it would operate? If not, you need to do that. Reverse bleed by connecting a hose from the nearest brake caliper bleeder to the bleeder on the slave cylinder, and pump the brakes until no more bubbles come up on the brake fluid reservoir.

You may need to use zip ties on the hoses at the bleeders to keep the pressure from popping the hose off.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC