Following are the five stages of automation for vehicles. Each level includes all the functions of the previous levels.
Level 1 - Anti-lock brakes (see ABS
Level 2 - Warnings for open doors and unbuckled seat belts. See TPM
Level 3 - In 2019, most new cars have these features, which you can look up individually. See navigation system
, adaptive cruise control
, collision avoidance system
, lane departure system
, blind spot monitoring
and adaptive headlights
Level 4 - User-initiated self-driving; for example, Tesla's Autopilot. A few cars are at this stage in 2019.
Level 5 - No steering wheel. See self-driving car