Citroen C4 DCM3.4 via OBD or BDM?

[krzysdro1974]

Hi, I want to do chiptuning Citroen C4 2.0HDI Delphi DCM 3.4.
I have kesss V2 4.036 from fazooley. Is it safe via OBD?
Is it better to do this ECU via BDM?

Kris

[maajkii]

OBD is ok....