Fuel System Pressure Release (2.8L VR6, Engine Code AES)
WARNING: This page is about a different car, the 2003 Volkswagen EuroVan, 2002 Volkswagen EuroVan, 2001 Volkswagen EuroVan, 2000 Volkswagen EuroVan, and 1999 Volkswagen EuroVan. However, it is still accessible from the selected car via links, so may be relevant.
Fuel system is pressurized! Wrap a cloth around the connection before loosening hose connections or opening a test connection. Carefully release pressure by pulling off the hose or by removing the plug.