AWD will work perfect for you. A common misconception is the idea that AWD means that all the wheels are being powered at all times. Actually just the rear tires are being powered. There is a detector in the transfer case and the front/rear differentials that sense when one or more tires are loosing traction. The transfer case/differentials automatically transfer power to the tires that still have grip. As soon as conditions are back to normal the rear tires take over again. There are no buttons to push or selector for 2 wheel/4 wheel because the system is on all the time. 4WD is user selectable and can have similar components. The difference is that the vehicle is always in 2 Wheel unless 4 wheel is selected by the driver. Hope this helps clear up any confusion.