Audi A6 2005 Workshop Manual page 17

Note
Depending on the version, the min‐
imum permissible weight for a used
brake disc is stamped on the brake
disc hub. The disc must be renewed
when the weight of the disc is less
than or equal to the indicated mini‐
mum weight.
Caution
If the minimum permissi‐
ble weight of the disc is
indicated on the hub of
the disc ("min. weight"),
the disc must be addi‐
tionally weighed to as‐
sess the amount of wear.
WARNING
If one brake disc is dam‐
aged or worn, the other
discs must also
checked for damage and
wear.
The brake disc must first be cleaned before assessing the degree
of wear as described below.
WARNING
DO NOT clean the brake disc with water or other fluids. Oth‐
erwise false results will be obtained.
Note
The brake disc ventilation drillings must be completely free of
♦
brake dust and dirt. Clear out carefully with a suitable tool if
necessary. Do not use force.
Thoroughly blow out the brake discs with compressed air (in‐
♦
cluding the area between the cooling channels and ventilation
drillings).
Carefully place the clean, dry brake disc on the scales.
♦
Caution
Always observe respiratory protection requirements when
cleaning brake discs or other parts of the brake system using
compressed air.
To assess the brake disc wear, proceed as follows:
♦ 1. Wear assessment by checking thickness of brake disc
be
Audi A6 2005 ➤ , Audi A6 Avant 2005 ➤
Brake system - Edition 04.2019
3. Assessing degree of wear on ceramic brake discs
11