Clean Working Conditions

Absolute cleanliness is required when working on the anti-lock brake system, it is not permitted to use any products which contain mineral oil, such as oils, greases etc.
Thoroughly clean all unions and the adjacent areas before loosening. Do not use aggressive cleaning agents such as brake cleaner, fuel, thinners or similar chemicals.
Place parts that have been removed on a clean surface and cover.
Carefully cover over opened components or seal, if repairs are not performed immediately (use sealing plugs from the Repair Set 1H0 698 311 A).
Only use lint-free cloths.
Only unpack replacement parts immediately prior to installation.
Only use parts in their original packaging.
Do not work with compressed air and do not move vehicle while the system is open.
Make sure that brake fluid does not enter harness connectors.