Bio-Diesel OK in new E-320?

[robbin]

What is the truth regarding Bio in a 2007 Mercedes Bluetec? Mercedes has only approved a 5% blend provided the bio meets ASTM D6751 & has the necesssary osidation stability )min. 6h, proved with EN14112 method) to prevent damages to the system from deposits and/or corrosion.

Does the biodiesel sold here in Houson meet these criteria?

Is Mercedes being overly conservative? Can you actually run a higher percentage blend? (B-20)

Will running biodiesel adversely affect my engine?

Can mercedes tell when servicing the car whether it has been using biodiesel, and if so, can they tell what percentage blend I have been using.

Just concerned because there are so many unknowns for me.

Thank you for any input you all could give.