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Check yer brakes discs


GT6 M

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Posted

My Marra  Rod, has had a pulsing brake pedal for a few days, and a noise to gaa with it.
so got at it, and found this.

a little scored,, front



back



side








Inside,!!!! never seen this before, seen craks, but never this
not a preety sight.














M









Posted

A Merc too !!! original discs. and replacements were same shape inside.
never seen vented like that, all i seen ev a spiral form

M

Posted

That's weird, Markus!
The bumps on the opposite faces look as if they intersect, rather than meet, so that the clamping force of the caliper would flex the two faces, making them narrower the further from the hub, and surely leading to ultimate failure by fatigue.   Thats what led to the two faces coming apart.

So weird, I have to ask. Are they really OE Merc parts?
They are, or at least Brembo make them, for a Merc, in that style:
http://www.amazon.co.uk/Brembo-Mercedes-M-CLASS-163-154-09-7606-11/dp/B006J731KE

John

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