Just got my order specs for my 2013 ML350 and under standard stuff it lists (929) Flex Fuel Capability. The 2012 Manuel specifically says (page 386) that there can not be more than 10% ethanol. I have read other forums where some have said its OK but not labeled on the fuel door and others that said it is labeled on the fuel door. Maybe this is a 2013 thing. Any thoughts?