Wipe down the pan with some solvent (carb or brake cleaner) and look for possible cracks. (that would suck but check for peace of mind) Try to locate where the actual leak is coming from. Why I mentioned above is - the pans are cast aluminum and can crack. Not real likely unless you hit something - guys in Florida know all about it - the gas stations in Fl have raised fill tank inlets (where tankers fill the stations' tanks) and those things are a BMWs' #1 enemy in Florida. Keeping my fingers crossed for ya that it's a simple fix.