I was once told that the front rotors are not to be turned because they would warp. Is this true or was the mechanic trying to make out on selling me new rotors. There is a little ridge on the outer edge... The post on replacing the pads said nothing about replacing or turning the rotors...

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Peter L. House
1998 Sport E430
Azure Blue

This is a subject that can have many answers, so what does M.B. say? Under warranty M.B.USA says to reface brake rotors as long as the rotors will be 0.8mm above min. specs when the rotors are refinished.. Also only resurface "warped" rotors, as small grooves don't hurt braking performace.

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MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS M.B. TECH

The key here is the min thickness that is published by Mercedes. I have done repair for a long time and have never cut the rotors on a Mercedes.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
LEAD TECHNICIAN FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

Thanks, Whats the minimum thickness? The rotors are not warped or anything like that, theres just that little ridge at the outer edge... I will probably be doing the front brakes this weekend

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Peter L. House
1998 Sport E430
Azure Blue

Hi Peter
The Min Thickness on your front brake rotors
is stamp on the rim of the brake rotor.
That show you the safe thickness on your brake rotors.
Have your mechanic check it first.
If rotor are too thin,You have to replace it.
Because when rotor down below fectory min specs it will warped & crack easily and you don't want happen to you.
Good luck to you !

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MB STARS Master Guild Technician,12 years MB tech
5 years independent shop owner

Has any one ever replaced the front rotors?
If so what is the torque for the bolts that hold the calipers on? The post is very informative about changing the brakes, but what is the torque specs for the 7mm allen bolts?>



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Peter L. House
1998 Sport E430
Azure Blue