C230 Advice

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ChrisDoc - 15 Feb 2005 14:56 GMT

I have a Merc C230 Kompressor Sports Auto.
When I brake, no matter what the speed, I get a "juddering"
sensation which seems to be running through the car.
The front brake discs were changed on the last service, about 3
months ago. I got the garage (non main dealer) to check that they
hadn't warped, which they hadn't and they replaced the front pads
for me.
They thought it was the prop shaft coupling, that was replaced but
still no joy.

Anyone got any ideas?

Thanks

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Rodney T. Grill - 15 Feb 2005 17:10 GMT

>I have a Merc C230 Kompressor Sports Auto.
> When I brake, no matter what the speed, I get a "juddering"
[quoted text clipped - 7 lines]
>
> Anyone got any ideas?

Try putting it in neutral before braking to isolate any transmission issues.
Also, what about the rear discs? They could be a problem also.

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- RODNEY

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Tiger - 15 Feb 2005 17:27 GMT

yep rear disc is a strong possibility.

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ChrisDoc - 16 Feb 2005 09:16 GMT

> >I have a Merc C230 Kompressor Sports Auto.
> > When I brake, no matter what the speed, I get a "juddering"
[quoted text clipped - 10 lines]
> Try putting it in neutral before braking to isolate any transmission issues.
> Also, what about the rear discs? They could be a problem also.

I have put it into neutral and then used the brakes, I still get the
judder.
I'm trying to contact my mechanic to see if he looked at the rear
brakes.
I'm trying to avoid the ?90 an hour fee that the main dealer wants
to look at it!!

Thanks for your advice

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Martin Joseph - 16 Feb 2005 17:45 GMT

>> Try putting it in neutral before braking to isolate any
> transmission issues.
[quoted text clipped - 6 lines]
> I'm trying to avoid the £90 an hour fee that the main dealer wants
> to look at it!!

try using just the emergency/hand brake CAREFULLY. If this produces
the judder also, then it's definitely the rear brake that is causing
this.

NB: This presumes the handbrake/emergency brake actuates the same
calipers/disc as the hydraulic brake... I don't know if this is
actually true in your car.

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Rodney T. Grill - 16 Feb 2005 19:05 GMT

> try using just the emergency/hand brake CAREFULLY. If this produces the
> judder also, then it's definitely the rear brake that is causing this.
>
> NB: This presumes the handbrake/emergency brake actuates the same
> calipers/disc as the hydraulic brake... I don't know if this is actually
> true in your car.

I doubt it. For most cars, the parking (a.k.a. emergency) brake is a
separate manual set of small brake shoes that contact a drum that's part of
the "hub" of the rear discs. This is done for several reasons, but mainly
to isolate the manual emergency system from the hydraulic system that is
controlled by ABS/ESP, etc.

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- RODNEY

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