Clean Working Conditions

WARNING: This page is about a different car, the 2019 Volkswagen Golf R. However, it is still accessible from the selected car via links, so may be relevant.

Even minor contaminations can lead to malfunctions in the fuel injection system. When working on the fuel supply/injection system, pay careful attention to the following rules of cleanliness:

Thoroughly clean all connections and the surrounding area before disconnecting.
Place removed parts on a clean surface and cover. Use lint-free cloths.
Carefully cover opened components or seal, if repairs are not performed immediately.
When the system is open, do not work with compressed air. Do not move vehicle unless absolutely necessary.
Install clean components: Remove the parts being replaced immediately prior to installation of the new parts. Do not use parts that have been stored unpacked (e.g. in tool boxes etc.).
Electrical connectors that have been disconnected: Protect from dirt and moisture. Make sure connections are clean and dry when reconnecting.