I towed my Cmax Energi for the first time over the holiday. I don't have a key. So, I push the brake and push the "on" button (the car into EV mode), shift into neutral and push the "on" button again to turn the car off. A message appears in the far left display saying to put the gearshift in park. Now, I'm ready to tow. Steering is unlocked. The displays go out, and I'm good to go. However, I've yet to figure out how to start the engine when not moving, thus recharging the battery at intervals. Consequently, I had a dead battery on my 7 1/2 hour return trip. (On the trip down we used the car midway and it charged then.) Does anyone know how to start the gas engine while still hooked up and sitting still on the Energi?