Fuel Leak Check
WARNING: This page is about a different car, the 1996 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.
To check for leaking high-pressure fuel line, start engine and allow it to idle. Place cardboard over high-pressure fuel line and connection. Note if a leak is being detected by fuel being sprayed onto cardboard. If leak exists, repair high-pressure fuel line as necessary.