After carefully studying the latest manual and the cab controls, I still cannot figure out how to set the PZB mode in this engine. The manual states, "Before you enable the [PZB] system, you must first check to ensure you are in the correct mode for your train. ...The mode selection can only be changed from the incabcontrol. Locate the switch and select the appropriate mode." However, no such switch seems to exist in the cab. Please advise only if you know what I mean and where the requisite switch is located.