bio in 01 tdi and 06 crd
I ran bio all summer last year in my vehicles.
The 06 libby ran fine, the 01 Jetta and the 04 Passat ran fine also. Yes I did run B100 in a PD TDI with no problems.
Just be sure it's good fuel, and has no residual methanol.
The 99 E300 also ran fine.