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#1
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Feels like I only have some brakes
The car stops but not as quick as before. I feels as if only the front brakes are working. The brake pedel has to go lower to stop and then it takes more pressure. Master cylinder? Booster? Where do I start?
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#2
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Start by checking for the proper brake fluid level in the rear brake portion of the master cylinder reservoir. And let us know a little more about the vehicle-model, year, etc.
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#3
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I apologize. The car is a 1983 300SD. The fluid level on the front chamber was a little low but not enough to make any difference.
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#4
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The fluid chamber for the rear brakes is hard to see. It essentially is filled when the front chamber overflows. I would suggest topping the reservoir just to make sure that the rear chamber is full. This setup has fooled more that a few MB owners.
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#5
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My guess is that your master cylinder is going. Mine did the same thing your car is doing and I had to replace it. Though I was certain it wasn't my rear brakes because I had just replaced the rotors and discs and flushed them a few weeks before the master cylinder started acting up. If it were your brake booster, you wouldn't be able to depress the pedal much.
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1999 Mercedes-Benz S600, 103K miles - garage queen 1988 Mercedes-Benz 560SEL, 89K miles - daily driver 2007 Hyundai Sonata Limited, 31K - daily driver |
#6
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Both chambers are full. I learned the hard way about 2 years ago when I was bleeding the breaks and going nowhere fast until I noticed that there were 2 chambers that had to be filled. Is there anything I can do with the master cylinder in the way of rebuilding? If not I will take a trip to a pick and pull to see what they have. Does anyone know if MB used the same part for different models and also what years?
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#7
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I'm with braverichard - sounds like the master cylinder. You can get a reman for $45 from Autozone.
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1984 300Sd 210k Former cars: 1984 300D 445k (!!) (Strider) Original (and not rebuilt) engine and transmission. Currently running on V80 ( 80% vegetable oil, 20% petroleum products). Actually not, taking a WVO break. 1993 300d 2.5 275k. Current 120/day commuter 1981 300SD 188k (Hans) Killed by a deer |
#8
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Quote:
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#9
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is your calipers sticking? i had poor brakes before teh rebuilt and i always thought it was because it is a heavy car=poor braking. i was so use to it after i rebuilt i constantly lock up the tires stoping.
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198? 300D ???K - Future DD 1989 300TE 285K - traded in '12 1984 300SD 186K - Sold in 08 1978 300SD 330K - Died in 05 |
#10
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IF you determine that your master cylinder is, indeed, the culprit, may I suggest replacing it with a new, or rebuilt one?
I do as much junk yard parts shopping as anyone,( and finances are a big concern ) but wear items, particularly wear items associated with vehicle safety are better off left in the junkyard. You just don't know what you're buying. There are exceptions, of course. Like a new MC with fresh paint and a box in the trunk with the old core--like the owner was on his way to return the core after installing it when he was broadsided, totalling the car. But like I said, that would be an exception. My friend always tells me that MB are so overdesigned that they only need one functioning brake.... (some friend!) |
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