Coating On The Pccb Brake Discs (Potential Causes)

The coating on the PCCB brake discs arises as a result of a high load and high temperatures, for example on a racing circuit. Check the following in such cases:

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Bores (perforations) in brake disc friction surface

• Ventilation (brake cooling): all components are present, secured correctly and undamaged.
• Brake pad quality: If the vehicle is used for race-track driving, use appropriate brake pads.
• The perforation bores - see illustration-  in the brake discs must not be blocked. Unblock them if necessary.

  > 465402 Checking rear PCCB brake disc (wear assessment) - section on  "INFORMATION "

• In the event of brake pad wear, the brake discs can still be used provided the brake discs satisfy all wear criteria

  > 465402 Checking rear PCCB brake disc (wear assessment) - section on  "INFORMATION "

  The perforation bores - see illustration-  must not be blocked.