Most diesel engines can run on biodiesel without any significant problems.
Biodiesel is a mild solvent, and therefore it could release some of the build up inside your engine which may cause some clogging of filters.
However, many car manufacturers have been slow to approve the use of any biodiesel blends over B5. There have been reports of car manufacturers denying warranty claims for failures of the fuel system (such as fuel pumps) where biodiesel has been used.