Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-08-2004, 09:55 AM
Registered User
 
Join Date: Dec 2002
Location: New Jersey
Posts: 218
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?
Reply With Quote
  #2  
Old 12-08-2004, 10:27 AM
Registered User
 
Join Date: Sep 2004
Posts: 8,494
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.
Reply With Quote
  #3  
Old 12-08-2004, 11:16 AM
Registered User
 
Join Date: Dec 2002
Location: New Jersey
Posts: 218
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.
Reply With Quote
  #4  
Old 12-08-2004, 12:13 PM
Registered User
 
Join Date: Sep 2004
Posts: 8,494
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.
Reply With Quote
  #5  
Old 12-08-2004, 12:41 PM
Registered User
 
Join Date: Mar 2004
Location: Kansas City, MO, USA
Posts: 1,213
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.
__________________
1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver
Reply With Quote
  #6  
Old 12-08-2004, 01:33 PM
Registered User
 
Join Date: Dec 2002
Location: New Jersey
Posts: 218
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?
Reply With Quote
  #7  
Old 12-08-2004, 01:43 PM
Registered User
 
Join Date: Jul 2004
Location: Annapolis, MD
Posts: 650
I'm with braverichard - sounds like the master cylinder. You can get a reman for $45 from Autozone.
__________________
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
Reply With Quote
  #8  
Old 12-08-2004, 02:00 PM
Registered User
 
Join Date: Dec 2004
Posts: 24
Quote:
Originally Posted by dpbrowne
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?
Two different master cylinders were used on '83 models. What are the last six digits of your VIN? Which is not to say that adequate troubleshooting has been done to positively implicate the master cylinder at this point.
Reply With Quote
  #9  
Old 12-09-2004, 05:12 AM
ned2683's Avatar
Registered User
 
Join Date: Oct 2001
Posts: 693
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.
__________________
198? 300D ???K - Future DD
1989 300TE 285K - traded in '12
1984 300SD 186K - Sold in 08
1978 300SD 330K - Died in 05
Reply With Quote
  #10  
Old 12-09-2004, 05:54 AM
MS Fowler's Avatar
Registered User
 
Join Date: Jan 2003
Location: Littlestown PA ( 6 miles south of Gettysburg)
Posts: 2,208
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!)
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 11:26 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page