Fuel Pressure Release
WARNING: This page is about a different car, the 2002 Volkswagen EuroVan, 2001 Volkswagen EuroVan, and 2000 Volkswagen EuroVan. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off and remove fuel pump fuse, see ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Fuel system is under pressure, before disconnecting any fuel system hose or line, cover fuel fitting with a clean shop towel.