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To: The Cajun

It’s not making any noises, so I don’t think it’s the brakes themselves and the fluid is still there. The pedal is getting “squishy” and traveling farther towards the floor. Wouldn’t that be the master cylinder or booster? I’m no mechanic of any kind. It’s a 1984 M-B 300D turbo diesel.


32 posted on 03/09/2011 7:51:45 PM PST by 2ndDivisionVet ("You cannot invade the US There would be a rifle behind each blade of grass." Yamamoto)
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To: 2ndDivisionVet; The Cajun
It’s not making any noises, so I don’t think it’s the brakes themselves and the fluid is still there. The pedal is getting “squishy” and traveling farther towards the floor. Wouldn’t that be the master cylinder or booster? I’m no mechanic of any kind. It’s a 1984 M-B 300D turbo diesel.

If the brake booster goes, the pedal gets hard to press because you've lost the vacuum assist. Squishy pedal can mean air in the line, or a master cylinder going bad.

39 posted on 03/09/2011 7:58:41 PM PST by fso301
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To: 2ndDivisionVet
Wouldn’t that be the master cylinder or booster?

It's a good bet that it's the master cylinder. Not a dificult job on an American car. Anti-Skid might be an issue if you see wires going to it. Otherwise, get a rebuilt one and bleed it on the bench before installing and then at the line connections after installing.

Youtube is a great knowledge source for any DIY.

41 posted on 03/09/2011 8:03:59 PM PST by Errant
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To: 2ndDivisionVet
How To Replace A Master Cylinder
44 posted on 03/09/2011 8:15:03 PM PST by Errant
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To: 2ndDivisionVet
Never did work on a Mercedes-Benz and have no experience with its' brake system (Ford, Chevy and Dodge experience), but the symptoms sound like the trouble I had with my wife's El Camino (no loss of fluid, pads in good shape). Turned out to be the master cylinder, (NAPA replacement master cylinder was nearly the same price as the parts to rebuild old one) and an easy fix I did myself. Most time consuming part was bleeding air out of system after repair (very important).
Don't know how cheap and easy it would be with a Mercedes (guessing not that cheap).
53 posted on 03/09/2011 8:26:47 PM PST by The Cajun
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To: 2ndDivisionVet

Prayers for healing and peace. Check your Freepmail from me.


74 posted on 03/09/2011 9:44:35 PM PST by boatbums (God is ready to assume full responsibility for the life wholly yielded to him.)
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