I think I have a fuel leak. It doesn't matter where I drive it or how I drive it, my 1993 300D 2.5 always smells like diesel fuel. Here are some pictures of fuel pooled where one of the fuel injectors sits (At least, I think it's a fuel injector. I'm not really a car expert, but I do well at following directions

) I'm not sure if this is the only place it's leaking, but I'd like to fix this first. For some reference, I'm trying to diagnose and fix the reason the car doesn't have much power at highway speeds (
http://www.peachparts.com/shopforum/showthread.php?t=244533)
The metal line and the braided lines are not wet, so I think the leak is at the injector itself. Should I just replace it? Tighten it somehow?