Fiat Ducato ( + Peugeot Boxer + Renault Sprinter)

HI - I tried to the connetion with the CAN BUS of my Ducato - but no luck. 
I use the ESP32 with SN65HVD230 (+120R Termination). I use the ODB connector right the steering and also the builders-port (Pin 9+10) right behind the co driver seat. In SW I select differend BAUD rates in OBD2.cpp (500k, 250k, 125k, 50k) All without success. 

Any hints or ideas ?