I suggest replacing the other caliper and any other other hydraulics not already new including the master cyl. Kudos to you for running a 110! I had two of them back when they were just used cars. Nice cars! Once you figure it all out it will drive just like a nearly new car.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Manual or automatic transmission?

Was the MC bench bled before installation?

Was the system pressure bled?

What year/model is the car?

Dual or single reservoir master?

Good luck!!!

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

Bench bleed. Agree with those above. You may be surprised.

I'd replace the flex lines you haven't, too.

The car is 1968 with a 4 speed manual on the floor. I bled the master cylinder while it was connected to the booster. Hooked up plastic lines to the ports and fed them into the reservoir and pumped until no more air. I ordered flex lines and also I have not pressure bled the system.

I agree with this - whenever I want to get a new old car (or one of my old old cars that's been sitting) ready to use on the road, I replace or rebuild everything in the braking system that has rubber in it, since the rubbber swells and/or dries out over time. Replace everything at the same time and you're starting from a known solid base.

Brakes and tires are the wrong areas in which to economize.

Best of luck, and keep us posted!

Best Regards,
Rob

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Robert Fini

'12 ML350 BlueTec, 100k
'06 E320CDI (x2)
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 70k
'97 C36AMG, 319k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Vintage Racer build in progress)

You changed a caliper. Right one for the side needed? I do not know the orientation of the rear brake cylinders on that model. But bleeders on all three have to be at the high points. Or there is trapped air you cannot get rid of. Simple test for the rear brake cylinders. Do they specify a different part number for the right and left sides?

There is a difference on the front calipers. Wrong one in the box is not unknown. I am being fussy here because at this moment I forget even what a 110 looks like, Mind their rear brakes. For example usually rear brake cylinders are mounted at the very top.