Problem Solved; Maybe?
I removed the spare tire to get a better look at things on the top of the tank. Upon closer inspection, I found that the small mystery line from the fuel filter, AKA, fuel filter vent hose, is supposed to connect to the fuel tank just near the filler neck. Mine was not connected, as the short rubber hose connecting it was torn in half. Interestingly enough, in my further research, I stumbled on a post from 2010 on another forum , titled; “Fuel leaking driver side rear tire” where a fellow with the same year ML, 1999, had the EXACT same problem; a tear in this small hose at the rear top of the tank. I also learned from this post that this vent hose should be dry; well mine is filled with fuel. Soooooooooo, I’m assuming I have two issues, the torn line that needs repair, as well as a bad fuel pressure regulator in the filter that needs replacing. I will try to get the parts tomorrow from the dealer and report results for reference by future fuel leakers.
Thanks,
Out