This is arguably the 2015 Edge’s coolest new feature. Ford and supplier company Takata have developed an adaptive steering system that takes the work out of driving. It varies the ratio between the tiller and front wheels, which reduces wheel winding at low speeds but doesn’t sacrifice stability at increased velocities.
BMW and Audi have offered similar systems in the past but Ford’s take on this is technology seems a bit simpler. It features a small electric motor mounted in the steering-wheel hub as well as a worm gear. The worm gear meshes with a spur gear, which is attached to the steering shaft. By powering the motor in one direction or the other it physically turns the steering shaft, which adjusts the overall steering ratio. It’s a pretty clever design that’s a bit difficult to explain but is fairly simple in practice. For safety, if there’s ever a problem the system prevents the motor from moving.