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#1
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Brake pedal sticking...
95 S280
Aside from having semi spongy brakes... my pedal sticks, and needs to be "lifted" manually to release the brakes...EVERY TIME the pedal is depressed. What could cause this? (ABS electronics INOP... disconnected)
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![]() 85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project |
#2
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Broken/disconnected return spring?
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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. 99 Mazda Miata 183,xxx miles. |
#3
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MB has a light return spring, however not all brands of cars use a spring so I suspect this is more of an anti rattle device than peddle return.
The power brake booster should return the peddle on it's own. With power brakes, even if the master cylinder is stuck the peddle will still return. With the engine off , press the peddle a few times to bleed the vacuum off. Does the peddle still stick? If not, the booster has a bad control valve ( this usually can't be repaired in the field ). If it still sticks, disconnect the push rod from the peddle and see if the peddle is stiff to move, if not change the booster. |
#4
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Spring is intact...
When depressing the pedal with the engine off it returns as normal... only with the engine running will it stick. ![]()
__________________
![]() 85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project |
#5
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Time for new booster?
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![]() 85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project |
#6
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+1 on booster. Consider doing the MC (and the brake hoses) at the same time if your existing one is ancient.
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