Clean Working Conditions

Always clean connection places and surrounding areas with engine or brake cleaner before loosening and dry cleaned places.
Immediately seal open lines and connections with clean plugs or protective caps.
Place removed parts on a clean surface and cover. Only use lint-free cloths for this!
Carefully cover or plug unpacked components if repairs cannot be performed immediately.
Only install clean components: Remove the replacement parts from their packaging just prior to installing them.
Protect the disconnected connectors from dirt and moisture and only connect when they are dry.