raw1879

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

benzslo

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.

raw1879

the problem was there before I changed the calipers

cm60k

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,,

raw1879

thanks zayed the ring is a wonderful place. I love what you have done to your car you are a true w202er. I will try a new M/C I hope it will work how is your pedal?

DRBC43AMG

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.

raw1879

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.

DRBC43AMG

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

cm60k

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,,

raw1879

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

raw1879

sorry but what is S/A

cm60k

Silver Arrow Edition...

ZAYED,,

raw1879

ok thanks so ill get a sl600 M/S

DRBC43AMG

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....?

cm60k

Good point Daniel, i would say yes, when i put SL600 M/C, feel a good difference brakes & pedal....

ZAYED,,

Sulaco

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?

raw1879

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.

raw1879

I was working on a clk430 w208 witch has the same brakes as a c43 the brake pedal was just great really good feel

raw1879

hi do you know the part number for the sl600 M/C

DRBC43AMG

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.

cm60k

Sure, it's "005 430 89 01"...


ZAYED,,

KJI3jflarryfe93

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?

raw1879

thank you

cm60k

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...



ZAYED,,

KJI3jflarryfe93

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?