2013 Ford EDGE - can you flat tow this vehicle?

We tow a 2013 Edge. Roadmaster tow bar sub frame and air brake. No problems.
Follow procedure and put it acc position and close air to recirculate and so on. Turn of head lights.
batter won't get drained if procedure is followed and tail and brake and turn lights work fine. Start it up and run through the gears every eight hours I think. We do it every time we stop.
You have to have the charge wire.