A Mercedes G-class, for instance, behaves like an AWD vehicle until you lock its center differential, at which point it becomes a 4WD truck. One of the easiest ways to know if your vehicle has AWD ...

While a 4x4 SUV runs in rear-wheel-drive or 2WD mode by default and comes equipped with a transfer case to divide power between the front and rear axles, an AWD system automatically distributes ...