bad brakes
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Senior Member
Joined: Sep 2009
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From: london
Mercedes C55 AMG
bad brakes
I visited the nurburgring again this year and the car handled a lot better than last year, the kmac bushes and strut braces made a significant improvement. But the car still has this super soft brake pedal (I came off track at one point because of it) the 6 pot calipers I put on should of made the brakes better they are not. its like the brake booster is over assisting when the engine is running and I keep my foot on the pedal it goes to the floor (not when engine is off) any help please
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From: MN, USA
C43 5.4, ML320CDI, Fords
On a normal, unmodified car, if the pedal is going to the floor you have a bad master cylinder or an external leak.
You put on 6 piston calipers, did you change the master cylinder to match those? That is going to require extra volume of fluid to properly fill those larger calipers each time you push the brake pedal.
You put on 6 piston calipers, did you change the master cylinder to match those? That is going to require extra volume of fluid to properly fill those larger calipers each time you push the brake pedal.
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 453
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From: london
Mercedes C55 AMG
On a normal, unmodified car, if the pedal is going to the floor you have a bad master cylinder or an external leak.
You put on 6 piston calipers, did you change the master cylinder to match those? That is going to require extra volume of fluid to properly fill those larger calipers each time you push the brake pedal.
You put on 6 piston calipers, did you change the master cylinder to match those? That is going to require extra volume of fluid to properly fill those larger calipers each time you push the brake pedal.
the problem was there before I changed the calipers
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From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
Fabulous video, Thankss for sharing..
+1 with Benzslo, when M/C goes bad, you will hate your brake, even if upgraded,,
better if you can put stronger M/C, preferably from R129 SL600 silver arrow....
ZAYED,,
+1 with Benzslo, when M/C goes bad, you will hate your brake, even if upgraded,,
better if you can put stronger M/C, preferably from R129 SL600 silver arrow....
ZAYED,,
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From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
Oh dear, it look like you have indeed some problems. I just can't imagine that with six pot calipers will not stop you each and every time.
1. Your MC could be faulty. That's the first thing I would check!
2. Have you got some fresh high temperature BF in the system? Minimum quality some Super Blue. Castrol SKF is great but used mostly in racing conditions requiring frequent bleeds.
3. Have you done a bleed recently? If it is last year and you live in a damp climate, change the fluid and bleed.
4. What pads do you have front and back?
By the way, what's rattling when going around bends? Also it seems your front wheels are touching the wings under hard braking. Sounds like rubbing to me.
1. Your MC could be faulty. That's the first thing I would check!
2. Have you got some fresh high temperature BF in the system? Minimum quality some Super Blue. Castrol SKF is great but used mostly in racing conditions requiring frequent bleeds.
3. Have you done a bleed recently? If it is last year and you live in a damp climate, change the fluid and bleed.
4. What pads do you have front and back?
By the way, what's rattling when going around bends? Also it seems your front wheels are touching the wings under hard braking. Sounds like rubbing to me.
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 453
Likes: 76
From: london
Mercedes C55 AMG
Oh dear, it look like you have indeed some problems. I just can't imagine that with six pot calipers will not stop you each and every time.
1. Your MC could be faulty. That's the first thing I would check!
2. Have you got some fresh high temperature BF in the system? Minimum quality some Super Blue. Castrol SKF is great but used mostly in racing conditions requiring frequent bleeds.
3. Have you done a bleed recently? If it is last year and you live in a damp climate, change the fluid and bleed.
4. What pads do you have front and back?
By the way, what's rattling when going around bends? Also it seems your front wheels are touching the wings under hard braking. Sounds like rubbing to me.
1. Your MC could be faulty. That's the first thing I would check!
2. Have you got some fresh high temperature BF in the system? Minimum quality some Super Blue. Castrol SKF is great but used mostly in racing conditions requiring frequent bleeds.
3. Have you done a bleed recently? If it is last year and you live in a damp climate, change the fluid and bleed.
4. What pads do you have front and back?
By the way, what's rattling when going around bends? Also it seems your front wheels are touching the wings under hard braking. Sounds like rubbing to me.
year ill try the master cylinder
the money is the ash tray is rattling and the front tyre where rubbing I had my damper on soft setting.
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12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
OK understood! 
As your location is London, if you are having problems, may I suggest you contact Olly at http://prestigecarservice.co.uk
at Horndean on the South coast. Top guy and knows MB's inside out
As your location is London, if you are having problems, may I suggest you contact Olly at http://prestigecarservice.co.uk
at Horndean on the South coast. Top guy and knows MB's inside out
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Joined: Aug 2006
Posts: 7,053
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From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
Thankss for kind words,
Waaaaw, what a great place MaaaaN, if i'm in your place, i will put a tint and never ever move...
,
i don't think stock C43 M/C will be enough to pushing/pressure oil, for 6/4 pot calipers, more more better pedal with SL600 S/A,
of course, you can feel a difference with it,,
as you know, good bleeding should to be supported with M/C, to get a best result...
ZAYED,,
Waaaaw, what a great place MaaaaN, if i'm in your place, i will put a tint and never ever move...
,i don't think stock C43 M/C will be enough to pushing/pressure oil, for 6/4 pot calipers, more more better pedal with SL600 S/A,
of course, you can feel a difference with it,,
as you know, good bleeding should to be supported with M/C, to get a best result...
ZAYED,,
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 453
Likes: 76
From: london
Mercedes C55 AMG
OK understood!
As your location is London, if you are having problems, may I suggest you contact Olly at http://prestigecarservice.co.uk
at Horndean on the South coast. Top guy and knows MB's inside out
As your location is London, if you are having problems, may I suggest you contact Olly at http://prestigecarservice.co.uk
at Horndean on the South coast. Top guy and knows MB's inside out
yeah I now them guys I was at the pcs/mb club meet a few weeks ago
they was not sure what the problem is the car brakes ok just the pedal goes iam going to change the M/C on Monday
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 453
Likes: 76
From: london
Mercedes C55 AMG
Thankss for kind words,
Waaaaw, what a great place MaaaaN, if i'm in your place, i will put a tint and never ever move...,
i don't think stock C43 M/C will be enough to pushing/pressure oil, for 6/4 pot calipers, more more better pedal with SL600 S/A,
of course, you can feel a difference with it,,
as you know, good bleeding should to be supported with M/C, to get a best result...
ZAYED,,
Waaaaw, what a great place MaaaaN, if i'm in your place, i will put a tint and never ever move...
,i don't think stock C43 M/C will be enough to pushing/pressure oil, for 6/4 pot calipers, more more better pedal with SL600 S/A,
of course, you can feel a difference with it,,
as you know, good bleeding should to be supported with M/C, to get a best result...
ZAYED,,
sorry but what is S/A
MBWorld Fanatic!
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From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
What about a M/C from a SL600 S/A on a non modified C43 brake system. Perhaps that would cure once and for all the softish pedal some experience on the vehicle....?
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From: America
1999 C43 AMG, 2005 E55 Wagon
soft pedal in my 98, REALLY strong pedal on my 99 so strong the brakes are scary good.
That video was exhilarating! Love the sound of that 5.4l winding through the top end.
It's really rare to see a w202 pass anything at the Nurburgring. Was that Audi a 2.0t?
That video was exhilarating! Love the sound of that 5.4l winding through the top end.
It's really rare to see a w202 pass anything at the Nurburgring. Was that Audi a 2.0t?
Thread Starter
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Joined: Sep 2009
Posts: 453
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From: london
Mercedes C55 AMG
it was a Audi RS4 he slowed me down. if I had confidence in my brakes I would of been faster the other mods ive done have really made the understeer a thing of the past. I did not put a lot of camber on the front wheels I will next time then I think ill have better turn in. W202 has a great chassis once understeer is dial out.
Last edited by raw1879; Jun 8, 2014 at 02:39 AM.
Thread Starter
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From: london
Mercedes C55 AMG
I was working on a clk430 w208 witch has the same brakes as a c43 the brake pedal was just great really good feel
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From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
What about using another M/C instead if the SL600 S/A? I have a feeling the price could be high as that of the vehicle.
Last edited by DRBC43AMG; Jun 8, 2014 at 05:58 AM.
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does SL600 MBC fit on C43 brake booster w/o modifications?
i have the w203 C32/C55 4-pot front calipers
do i need to get a better master brake cylinder for these calipers?
maybe C32 usese the same MBC as C43?
Last edited by KJI3jflarryfe93; Jun 8, 2014 at 10:43 AM.
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 453
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From: london
Mercedes C55 AMG
thank you
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From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
the SL600 master brake cylinder is it heavy duty vs MBC for C43?
does SL600 MBC fit on C43 brake booster w/o modifications?
i have the w203 C32/C55 4-pot front calipers
do i need to get a better master brake cylinder for these calipers?
maybe C32 usese the same MBC as C43?
does SL600 MBC fit on C43 brake booster w/o modifications?
i have the w203 C32/C55 4-pot front calipers
do i need to get a better master brake cylinder for these calipers?
maybe C32 usese the same MBC as C43?
SL600 M/C is the last update mechanical version, i can tell it's a best one, of course this is my IMO,
pls if any one got another experience with it chime in,,
C32 got a differ. M/C with brake pressure sensor in it...
ZAYED,,
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Honestly, what i remember, bend the line that attaches to the M/C, i didn't remember done anything else,
SL600 M/C is the last update mechanical version, i can tell it's a best one, of course this is my IMO,
pls if any one got another experience with it chime in,,
C32 got a differ. M/C with brake pressure sensor in it...
Attachment 288462
ZAYED,,
SL600 M/C is the last update mechanical version, i can tell it's a best one, of course this is my IMO,
pls if any one got another experience with it chime in,,
C32 got a differ. M/C with brake pressure sensor in it...
Attachment 288462
ZAYED,,
do you think it's a good reason to swap the C43 MBC for a better heavier duty version even for w203 C55 calipers?
you had the same 4 pot calipers in your car before, did brakes feel good with C43 MBC?
