Hey Kev,
I use mine to lower for connecting the caravan, when connected, raising back to original height.
I can use it outside the vehicle, but all doors have to fully closed, including rear door, and ignition on. It doesnt require the engine to be running.
Yes I have the 7 seater too, but as I am mostly on my own, ie, no kids, not worried about rear AC.
Happy motoring.
Brian

