Hi All. Does anyone know of an OBD2 program that will fully work on Mercedes cars? I have tried numerous different ones, some will not even log on, and some will not recognize the ecu. However, I have two that will work, but only give the very basic readouts, ie: no more info than you can get from the dials on the dash, like temperatures, rpm etc etc, but none that will display full info and any fault codes. I am using a laptop connected via an ELM 327 v1.2a unit that plugs into the OBD2 socket under the steering wheel dash, (Standard 16 pin socket) on my S320 cdi W220 2002. Any ideas or help would be gratefully received. Ian J.