I thought all MSD80/81 used CAN for datalogging, but early N54 vehicles around 2006 forward it on K line to the OBD port? The early MEVD17 use CAN at the DME and CAN at the OBD port, later use mostly flexray at the DME and CAN or 100 BASE TX at the OBD port.No. Canbus is not used.