Tesla’s driver-assistance system that includes automatic steering and braking is called Autopilot.
Tesla introduced Autopilot in 2015 as a package of advanced driver-assistance features rather than a fully autonomous driving system. Its capabilities have included traffic-aware cruise control, lane centering, automatic emergency braking and other collision-warning functions, depending on the vehicle’s hardware and software version.
A common mix-up is Navigate on Autopilot, which is a feature within the broader Autopilot ecosystem that can guide a car along a route and assist with certain lane changes. Summon is another separate feature for moving a Tesla into or out of parking spaces. Full Self-Driving is a differently named, more expansive assistance package; despite its name, Tesla systems still require an attentive human driver and do not make the vehicle fully autonomous.
Autopilot is generally classified as Level 2 driver assistance: the car can control steering and speed in suitable situations, but the driver remains responsible for monitoring the road and taking over.