How does the car park itself and brakes on itself

Hey I just test drove the Ford Focus.. and as you can see in this video. It does parallel parking and brakes on its own when a car in front of you stops. How can this be done? can you explain the technology and is it reliable. Thinking of buying it. Please help. Its me on the video I am asian and speaking in Filipino here.
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  1. Best answer
    It's done the same way bats find their way around in the dark, it's called SONAR. They use ultrasonic transducers in the front and rear bumpers and lots of computer processing to determine what is where.
  2. Best answer selected by arnoldlouie.
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