Am starting to see MY '14 E350 coupes showing up on dealer inventories in/around my area, but am unable to determine what is meant by the option "Dual Fuel". I have just gone through the MB online model brochure, but couldn't find these words connected in any way/shape/form. Any valid thoughts/knowledgeable input? tks

Not sure, but as a guess, what about able to use E85 blend?

anything is a possibility ... but if so, wouldn't this have been brought in the brochure? Most manufacturers (well, GM anyway) go out of their way to advertise this fact ... even with the addition of an emblem on the rear or the car ... but not one reference to "Dual Fuel" in the brochure or on the MBUSA website (under "options" or anywhere else that I can find).

Did just receive an email from one of the dealers listing this car on their inventory that the car can use either premium/E85 blend fuel.

Just checked my vehicle information order. I have one in production and was finished in production July 5th.
The dual fuel shows on the build as code 929 flex fuel.