MB allows 5% blends of Bio in the CDI and Bluetecs.

You won't find many first hand experiences as there aren't that many folks on this board who have one and fewer yet who experiment with them. There are other forums where they are more prevalent.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)