Yes, sounds like either bad calipers or else something was not
assembled correctly when you installed the new pads. If calipers are
on the way out, then failing after new rotors and pads is common,
because that's when the corroded piston gets pushed all the wa back
It would seem strange that both front wheel swould lock up because of
a binding caliper. For both to fail simultaneously this soon seems
really strange to me. If I am reading this correctly, and BOTH front
wheels are locking up and not releasing, I'd suspect something else.
In older cars I'd go with a bad proportioning valve, but I'm not sure
the M class has them. However, if it is only one wheel, then I'd go
with the caliper diagnosis. just my two cents.
It could be the soft brake lines. They have a date code on them. What
does it say ? 5 yrs or older means replace them right now.
When they get old they can swell, and accept hydraulic pressure but
they won't release it and the calipers stay "on".
Need Mercedes parts? http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
That was the first thing that came to mid. That happened on a '75 2002
I had. But I figured materials technology would have progressed far
enough by now that lines should last longer than 7 years. Especially
on a Mercedes. That seems really short. Oh well.
question what would be the cause and effect if the caliper was left as
is for some time ie how long can it be used in this state (curious
> > It is probably a sign of binding caliper... you need to
> replace the caliper.
> Yes, sounds like either bad calipers or else something was not
> assembled correctly when you installed the new pads. If
> calipers are
> on the way out, then failing after new rotors and pads is
> because that's when the corroded piston gets pushed all the wa
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Causes have already been suggested. As to how long it can be used in
"as soon as you depress the pedal the wheels lock up and will not free
the pedal is released. "
the answer to that should be obvious. It shouldn't be used at all,
unless maybe you were fleeing a volcano about to explode.
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