When the PND is docked to the head unit and car is running, can I shut off power to the PND?

Cannot shut off PND power alone while it's docked to the head unit. If PND is removed and hand-held, you can turn it off by pressing its PWR button. There's another "Power Off" method. By using the Power Saving Preference screen of PND, you can set PND in a mode to shut itself off at undocking. In addtion, you can turn off PND and Audio Head unit by pressing the [SRC] button for a few seconds while docking.