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Sensors, location/task/function - GF54.65-P-4102T

MODEL 209.3 /4, 211.0 /2 with CODE (220a) Parktronic system (PTS) 

Fig 1: Identifying Parktronic System (PTS) Sensors, Location
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Shown on model 211.0 

  Sensors, location   The front bumper PTS sensor unit (A42) and rear bumper PTS sensor unit (A43) are located in the respective bumper.
  Sensors, task   The sensors transmit ultrasonic waves and detect echoes from existing obstacles.
  Sensors, function   The ultrasonic sensors function based on the echo sounding principle and operate as transmitters and receivers.