More and more I suspect the Rear Gate trunk Module of somehow getting out of sync. I don't know yet but am pursuing the possibility. I am able to consistently create a sequence of operation (although not the correct one) where step two (the lift-gate motor) tries to open the hatch before the gate latch has been opened. After that, removing power from the car, shorting the positive terminal for about a minute, reconnecting the battery and then pressing the dash button for the lift-gate the gate unlatches and nothing further happens. At this point the hatch seems to be deaf, dumb, and blind. One can however lift it manually ( no button of any kind will move the hatch) and then close it manually wherein it latches solidly. Great fun, NOT!