FYI...
I have been using B100 (100% biodiesel) since April in a 1999 E300 Mercedes and a 1985 300D Mercedes. The 1999 has run over 7,000 on B100 and the 1985 has run over 5,000 on B100. It is wonderful fuel; no smell, quicker starting (less glow plug time when the engine is cold), quieter...