Have a 98.5 A4 1.8T. When I start the car in the morning a sound comes from the right side of the truck area. Sounds like water running throught pipes in an apartment. <p>Assume this is a closed loop fuel system initialization thing. Anyone else heard this sound??

It's been talked about. I think the best guess is that it's the fuel being pumped over the "hump" on quattro systems.