Notes On Evaluating Brake Disks - AH42.10-P-9406-07RQ

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Model 190, 197, 205, 212, 213, 217, 218, 222, 231, 253, 290

with code B07 (AMG - ceramic brake system)

Courtesy of MERCEDES-BENZ USA

Always check the inside and outside of the brake disks for damage.

The following types of damage may occur:

Chippings on the friction surfaces (A)
Chippings on edge of brake disk ring (B)
Chippings on perforation holes (C)

Chippings on the friction surfaces (A)

Chippings on the friction surfaces (A) can occur because of thermal stresses. Per brake disk, a max. of 3 chippings up to a size of 400 mn2 and a depth of max. 2 mm is permissible in each case.

The smaller chippings shown are normal, they have no influence on brake power or durability and are therefore not a problem.

Chippings on edge of brake disk ring (B)

Chippings on the edge of the brake disk ring (B) can occur because of thermal stresses or collisions. A maximum of 3 chippings of the following dimensions are permissible for each brake disk:

Length in circumferential direction max. 25 mm
Width in direction of friction surface max. 8 mm
Depth max. 3 mm

Chippings on perforation holes (C)

Chippings on perforation holes (C) can occur because of thermal stresses. They are permissible up to a length, width and depth of 3 mm in each case.

Courtesy of MERCEDES-BENZ USA