Guidelines For Clean Working Conditions

WARNING: This page is about a different car, the 2017 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

Thoroughly clean the connection points and the area around them first, and then loosen them.
Seal all open lines and connections immediately with clean plugs or caps from the Engine Bung Set:VAS6122 .
Place the removed parts on a clean surface and cover them so that they do not become contaminated. Use foil and paper. Only use lint-free cloths.
Make sure no dirt enters an >>open<< transmission.
Only install clean components. Install original parts immediately after removing them from their packaging.
Carefully cover any open components if the repair is not going to be performed immediately.
Protect the disconnected connectors from dirt and moisture and only connect when they are dry.