See also:

Draining of coolant water
If the vehicle is to be left outside without antifreeze, drain the cooling system, including the engine block. Refill before operating the vehicle. For details, see “Engine cooling system”. ...

To turn system off
Push the OFF button. ...

Good Ride, Better Handling
Though firmer than some in this class — the Mercedes C-Class, for one — the G37 rides comfortably, especially given our test car's stiffer rear-shock tuning, 18-inch wheels and lower-profile tires ...