JimW.......contact your State's Attorney Generals Office just to have the complaint/concern on record. The State could block the sale of any future diesel MBs until the manufacturer extends the warranty to cover use with the new state mandated B10. And they can put pressure on the Dealers to cover the recent vehicles already sold in your state with an in house warranty.

This has also been a concern about some gasoline vehicles from VW, BMW est. which states in their owners manuals that the use of fuel with more than 5% ethanol voids the warranty...............well all pump gasoline is now 10% ethanol in the US whether it is marked or not.

File an official complaint and keep yourself covered. Send a CC'd copy of the letter that you send to the State Attorney Generals Office also to the MB Dealer and to MB North America.

Personally I don't think you will have anything to worry about using B10

__________________
FRED

Daily Driver: 98 E300TD 199K
Hobby Car: 69 Austin Mini
Past Diesels: 84 300SD, 312K
87 300SDL, 251K
94 Chev. K-1500 6.5Ltr.TD, 373K