Panamera S (970) V8-4.8L (2010)
It is clear that the roughness is caused not only by depressions but also by bumps.
Replace brake discs! To do this, follow the instructions.
In general, the following applies: Brake discs must be replaced if the surface roughness (Rk) is > 80 microns!
3. Worn brake discs (special cases):
PCCB surface roughness (Rk) = 108 micrometers
3.1.
Surface roughness Rk = 108 microns, as for previous disc, but with some of the original friction surface remaining -arrow-.
Replace brake discs! To do this, follow the instructions.
In general, the following applies: Brake discs must be replaced if the surface roughness (Rk) is > 80 microns!
PCCB brake disc
3.2.
Surface roughness Rk = 72 microns. Borderline brake disc detected based on roughness, as well as wear indication and connected surface
fractures -arrows-, > 1 cm2. Replace brake discs! To do this, follow the instructions.
Checking brake discs for minimum thickness
Information
Minimum thickness of PCCB brake disc
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For perforated brake discs, the minimum thickness -X- must always be measured on the inner or outer friction surface track -arrows-.
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Wear limit: The minimum brake disc thickness is stamped on the brake-disc chamber (e.g. Min. Th. 37.7 mm).