New Master Cylinder - CAN'T BLEED???

[Ron Johnstone]

I installed a new master cylinder in my '86, 560SL and I foolishly didn't bench bleed it before installing. I have been bleeding it now about 75 times, using both a vacuum and additionally pushing/holding the brake pedal and I still have no pedal feel (it goes all the way down when pumping) and a load of air with some fluid comes out of the LR caliper. Yes, the reservoir is as full as possible.

I hate to remove the cylinder and start over again, but certainly will if that's the answer.

The car also has new rear calipers and rotors. No leaks anywhere I can see.

Suggestions will be greatly appreciated.