Notes On Evaluating Brake Disks - AH42.10-P-9406-07RQ
Model 190, 197, 205, 212, 213, 217, 218, 222, 231, 253, 290
with code B07 (AMG - ceramic brake system)
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.