Guidelines For Clean Working Conditions

Always clean the connection points and the area around them and then loosen them.
Seal open lines and connections immediately using thoroughly cleaned plugs from the Engine Bung Set:VAS6122 , for example.
Place the removed parts on a clean surface and cover them.
Carefully cover or seal opened components if repairs are not performed immediately.
Only use lint-free cloths
Remove the replacement parts from their packaging just prior to installing them.
Only use parts in their original packaging.
Protect the disconnected connectors from dirt and moisture and only connect when they are dry.