560SL. Driving out this AM got about 6 miles from the house. Went around on a curvy road and all of a sudden the brake pedal got real stiff. Really have to stand on it to get it to gradually stop! any suggestions?

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1988 560SL
Black Pearl/Palamino

my first thought is that you have lost booster function. Does the engine run properly with your foot on the brake at idle?

The booster is vacuum powered and for it to not work the vacuum has to leak which should make it run bad, or it is somehow not applied internally. The problem could be an ABS problem though. It would be very unusual though.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

Bad check valve?

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Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.

http://share.shutterfly.com/osi.jsp?i=EeAMW7Rs5bNmjhg

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1988 560SL
Black Pearl/Palamino

that be the brake booster line that runs from the manifold to the booster I believe.

Replacement part no. N4020-55996 from discountmbpart.com

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89 190E
2.6L
Arctic white
Grey leather
Sunroof
Pirelli P400 rubber
Smoked corners