The 2017 XT5 is Cadillac’s clean-sheet crossover designed to compete against some stiff competition that includes the Audi Q5 and Mercedes GLE. Part of its secret sauce is its fancy all-wheel-drive system. Unlike most AWD systems, the XT5’s is actually a part-time system, meaning the driver can turn the system off manually. A Simple button near the gear shifter toggles through three modes – Tour, AWD, and Sport. In Tour, only the front wheels get power. The biggest advantage is fuel economy, of course, but I’ve found the FWD mode also heightens the liveliness of the 3.6-liter V-6 thanks to less parasitic loss in the driveline.