Guidelines For Clean Working Conditions

The highest level of cleanliness is required when working on the ABS. Using any products which contain mineral oil such as oils, greases etc. is strictly prohibited.
Thoroughly clean all connection points and their surrounding areas before loosening. However, do not use aggressive cleaning agents such as brake cleaner, gasoline, thinners or similar compounds.
Place the removed parts on a clean surface and cover them.
Carefully cover or seal opened components if repairs are not performed immediately (use plugs from Assembly Part Set: 5Q0 698 311 ).
Only use lint-free cloths.
Remove the replacement parts from their packaging just prior to installing them.
Only use parts in their original packaging.
If the system is open, do not work with compressed air and do not move the vehicle.
Make sure that brake fluid cannot get into the connectors.