Joined passat forum looking for help working the bugs out of it. I get a definite gas smell after starting it up. Decided to look under back seat to check for fuel pump leak. Noticed no leak, just gas odor. And there is a space in the black cover, that looks like something should go. Am I missing a fuel pump control module here? Or are the covers built to hold one, but not all cars have it? On mine, the wire harness passes thru the black round cover, and plugs directly into the fuel pump. Is that normal? And where could the fuel smell come from? I'd greatly appreciate any and all help or suggestions from experienced passat owners!