W124/W201 Upgrade Brake Booster&Master cylinder
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Joined: Jun 2005
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S500
W124/W201 Upgrade Brake Booster&Master cylinder
Larger master cylinder and booster for those doing brake upgrades on their w124's and w201's.
The booster is out of a w140 part number 430 55 30 and master cylinder ends in 10 04, if memory serves me correctly was out of a r129.
I had this combo along side R129 334mm Silver Arrow brakes.
$70+shipping
Located in Southern Ontario
Paypal Okay
Email me at jfilipcic@gmail.com for quicker response
The booster is out of a w140 part number 430 55 30 and master cylinder ends in 10 04, if memory serves me correctly was out of a r129.
I had this combo along side R129 334mm Silver Arrow brakes.
$70+shipping
Located in Southern Ontario
Paypal Okay
Email me at jfilipcic@gmail.com for quicker response
Last edited by joef; Feb 14, 2011 at 09:07 PM.
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Joined: Dec 2010
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300E W124, 300E W124 3.4 AMG, Audi S3 2002
I have bought a set of C32 amg brakes for my W124 3.4 amg.
im tempted by this....donno if it will help out or not in my case coz i dont know what does my car have from factory (and im out of the country for the moment so i cant check)
im tempted by this....donno if it will help out or not in my case coz i dont know what does my car have from factory (and im out of the country for the moment so i cant check)
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Joined: May 2007
Posts: 179
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From: New Zealand
1996 E320 Sportline Cabriolet x 2
Joef,
One of my cars seems to have the front brakes doing all the work and the rears have gone lazy. Everything is in good order etc etc. Is there a way of fixing this and giving a little more bias toward the rear, is it a case of overhauling the clipers, booster or master cylinder. Hoses are all factory, even if they are expanding it should not affect the bias, is that right.
I need a little advice to fix the lazy rears. Hardly any dust, where as the fronts are almost black!
One of my cars seems to have the front brakes doing all the work and the rears have gone lazy. Everything is in good order etc etc. Is there a way of fixing this and giving a little more bias toward the rear, is it a case of overhauling the clipers, booster or master cylinder. Hoses are all factory, even if they are expanding it should not affect the bias, is that right.
I need a little advice to fix the lazy rears. Hardly any dust, where as the fronts are almost black!
Thread Starter
Super Member
Joined: Jun 2005
Posts: 622
Likes: 3
S500
Joef,
One of my cars seems to have the front brakes doing all the work and the rears have gone lazy. Everything is in good order etc etc. Is there a way of fixing this and giving a little more bias toward the rear, is it a case of overhauling the clipers, booster or master cylinder. Hoses are all factory, even if they are expanding it should not affect the bias, is that right.
I need a little advice to fix the lazy rears. Hardly any dust, where as the fronts are almost black!
One of my cars seems to have the front brakes doing all the work and the rears have gone lazy. Everything is in good order etc etc. Is there a way of fixing this and giving a little more bias toward the rear, is it a case of overhauling the clipers, booster or master cylinder. Hoses are all factory, even if they are expanding it should not affect the bias, is that right.
I need a little advice to fix the lazy rears. Hardly any dust, where as the fronts are almost black!
Sorry, I'm not an expert in this. I relied on my cousin and his knowledge.
Try AMGDave/GSXR (not sure what user id he uses on this forum) I believe he is knowledgable in this subject.
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Joined: Jun 2006
Posts: 303
Likes: 1
From: Northern California
It changes all the time
Joef,
One of my cars seems to have the front brakes doing all the work and the rears have gone lazy. Everything is in good order etc etc. Is there a way of fixing this and giving a little more bias toward the rear, is it a case of overhauling the clipers, booster or master cylinder. Hoses are all factory, even if they are expanding it should not affect the bias, is that right.
I need a little advice to fix the lazy rears. Hardly any dust, where as the fronts are almost black!
One of my cars seems to have the front brakes doing all the work and the rears have gone lazy. Everything is in good order etc etc. Is there a way of fixing this and giving a little more bias toward the rear, is it a case of overhauling the clipers, booster or master cylinder. Hoses are all factory, even if they are expanding it should not affect the bias, is that right.
I need a little advice to fix the lazy rears. Hardly any dust, where as the fronts are almost black!
Mercedes has always engineered a braking system to match the needs of each model. If you're going to drive an AMG to the mountains or down the autobahn at 160 km, Mercedes beefed the brakes up to match. The brake systems in all standard vehicles are more than sufficient.In answer to your question, I think your brakes are probably just fine. Front brakes on probably all vehicles do 75% of the work. The rear brakes only do 25%. If you look at all the other Mercedes vehicles, you will find the front wheels all dusted up and hardly any on the rears. This is perfectly normal.
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Joined: Dec 2010
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300E W124, 300E W124 3.4 AMG, Audi S3 2002
You seem to be the only one on this thread that has a legitimate concern. I think everyone else has more money than brains. Mercedes has always engineered a braking system to match the needs of each model. If you're going to drive an AMG to the mountains or down the autobahn at 160 km, Mercedes beefed the brakes up to match. The brake systems in all standard vehicles are more than sufficient.
Mercedes has always engineered a braking system to match the needs of each model. If you're going to drive an AMG to the mountains or down the autobahn at 160 km, Mercedes beefed the brakes up to match. The brake systems in all standard vehicles are more than sufficient.
Member
Joined: May 2007
Posts: 179
Likes: 0
From: New Zealand
1996 E320 Sportline Cabriolet x 2
You seem to be the only one on this thread that has a legitimate concern. I think everyone else has more money than brains. Mercedes has always engineered a braking system to match the needs of each model. If you're going to drive an AMG to the mountains or down the autobahn at 160 km, Mercedes beefed the brakes up to match. The brake systems in all standard vehicles are more than sufficient.
In answer to your question, I think your brakes are probably just fine. Front brakes on probably all vehicles do 75% of the work. The rear brakes only do 25%. If you look at all the other Mercedes vehicles, you will find the front wheels all dusted up and hardly any on the rears. This is perfectly normal.
Mercedes has always engineered a braking system to match the needs of each model. If you're going to drive an AMG to the mountains or down the autobahn at 160 km, Mercedes beefed the brakes up to match. The brake systems in all standard vehicles are more than sufficient.In answer to your question, I think your brakes are probably just fine. Front brakes on probably all vehicles do 75% of the work. The rear brakes only do 25%. If you look at all the other Mercedes vehicles, you will find the front wheels all dusted up and hardly any on the rears. This is perfectly normal.
Member
Joined: May 2007
Posts: 179
Likes: 0
From: New Zealand
1996 E320 Sportline Cabriolet x 2
That would stiffen up the pedal but would not "up the pressure" on the rears, as pressure is equal through-out the system.
I think it is likely this may be something to do with the master cylinder, or the rear callipers themselves...........?????
I think it is likely this may be something to do with the master cylinder, or the rear callipers themselves...........?????
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Joined: Jun 2006
Posts: 303
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From: Northern California
It changes all the time
I doubt if that has anything to do with the hoses. The chance of both of them becoming occluded is highly unlikely.I also doubt that there is a problem with two calipers. If all four pads are wearing evenly, chances are none of the four Pistons is stuck. It is not a common tool, but a brake shop may have a pressure gauge set.You remove the four pads and install special pressure sensors.You then apply the brakes and read the pressure per square inch on a gauge. You could also remove the two lines from the master cylinder that go to the front brakes and install plugs in the master cylinder. Drive and stop the car with just rear brakes, and see how that works. Remember the rear brakes only do about 25% of the work, so don't expect them to really stop the car effectively,but it might give you some clues. Good luck.
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Joined: Sep 2010
Posts: 134
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From: Norway
W124 230E 1990
I had problems with no brakes on my rear end last year, found the brake pads was totally worn out while the front pads was good as new.
Changed the rear pads, and while doing so I found the piston inside the caliper was hard to move.
But the brakes got very good after I installed the new pads, until now.. The problem is starting to come back, with almost no brake effect on the rear end. I think I need to overhaul my calipers, seems like they are hanging on and wearing out my pads by record time.
It is really not fun on icy roads when the front wheels tend to lock when I try to get stopped, and you need to put it in neutral just to get it to a full stop..
Changed the rear pads, and while doing so I found the piston inside the caliper was hard to move.
But the brakes got very good after I installed the new pads, until now.. The problem is starting to come back, with almost no brake effect on the rear end. I think I need to overhaul my calipers, seems like they are hanging on and wearing out my pads by record time.
It is really not fun on icy roads when the front wheels tend to lock when I try to get stopped, and you need to put it in neutral just to get it to a full stop..
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Joined: May 2003
Posts: 890
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From: Boise, ID, USA
300D, 500E, E420
Required reading for anyone thinking about updating their MC and/or booster:
https://mbworld.org/forums/e-class-w...r-upgrade.html
Summary: Pedal feel is highly subjective, and what one person thinks is great, another may not like at all. Pad compound can seriously affect pedal feel as well. Bigger is not always better, as I learned the hard way; I had to "downgrade" to a different setup after my big MC+booster turned out to be un-modulateable (hmmm, is that even a word?) during trail braking.
https://mbworld.org/forums/e-class-w...r-upgrade.html
Summary: Pedal feel is highly subjective, and what one person thinks is great, another may not like at all. Pad compound can seriously affect pedal feel as well. Bigger is not always better, as I learned the hard way; I had to "downgrade" to a different setup after my big MC+booster turned out to be un-modulateable (hmmm, is that even a word?) during trail braking.
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Joined: Jun 2006
Posts: 4,968
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1990 300ce 24v I6
Required reading for anyone thinking about updating their MC and/or booster:
https://mbworld.org/forums/e-class-w...r-upgrade.html
Summary: Pedal feel is highly subjective, and what one person thinks is great, another may not like at all. Pad compound can seriously affect pedal feel as well. Bigger is not always better, as I learned the hard way; I had to "downgrade" to a different setup after my big MC+booster turned out to be un-modulateable (hmmm, is that even a word?) during trail braking.
https://mbworld.org/forums/e-class-w...r-upgrade.html
Summary: Pedal feel is highly subjective, and what one person thinks is great, another may not like at all. Pad compound can seriously affect pedal feel as well. Bigger is not always better, as I learned the hard way; I had to "downgrade" to a different setup after my big MC+booster turned out to be un-modulateable (hmmm, is that even a word?) during trail braking.
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Joined: Jun 2006
Posts: 303
Likes: 1
From: Northern California
It changes all the time
As someone pointed out, selection of pads is very important. If you are willing pay extra for the best braking from your system as designed, go with OE pads instead of OEM. Your wheels will look like crap from all the black dust, but your brakes will operate at peak efficiency.
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Joined: May 2003
Posts: 890
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From: Boise, ID, USA
300D, 500E, E420
I don't think a 100rwhp 126 diesel is typically the kind of car people are looking to improve the brakes on. 
But yes, pad compound and brake fluid type/condition have a significant effect on fade resistance.
Regardless, for performance use the stock MB brakes are often inadequate, particularly if the engine power has been increased substantially. Larger brake rotors, pads, etc offer both increased fade resistance as well as increased brake torque. Almost all factory AMG cars came with larger brakes than stock. Would you say that AMG didn't need to do that...?
The original 500E brakes were barely adequate at all, no matter what pads were used. Even MB figured that out and increased the front brake size mid-production for USA and Japan (the Euro-spec cars got larger front AND rear brakes). Even those larger brakes on the late 500's are borderline when stopping from autobahn speeds, while they're fine for under 100mph, they're not confidence inspiring from 130mph. The infamous Silver Arrow kit makes a BIG difference from Warp 9 compared to the late 500E setup. I have one car with each and the difference is very obvious.
Besides, stock sucks!! LOL!
But yes, pad compound and brake fluid type/condition have a significant effect on fade resistance. Regardless, for performance use the stock MB brakes are often inadequate, particularly if the engine power has been increased substantially. Larger brake rotors, pads, etc offer both increased fade resistance as well as increased brake torque. Almost all factory AMG cars came with larger brakes than stock. Would you say that AMG didn't need to do that...?
The original 500E brakes were barely adequate at all, no matter what pads were used. Even MB figured that out and increased the front brake size mid-production for USA and Japan (the Euro-spec cars got larger front AND rear brakes). Even those larger brakes on the late 500's are borderline when stopping from autobahn speeds, while they're fine for under 100mph, they're not confidence inspiring from 130mph. The infamous Silver Arrow kit makes a BIG difference from Warp 9 compared to the late 500E setup. I have one car with each and the difference is very obvious.
Besides, stock sucks!! LOL!
Last edited by AMGDave; Feb 28, 2011 at 08:15 PM.
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Joined: Jun 2006
Posts: 303
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From: Northern California
It changes all the time
No I wouldn't say that AMG needs less brakes. Because of the power of the engine they are and should be beefed up. In fact they are so different that on some if not all models, the rotors can not be swapped side to side. Each side takes a different part #.
