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Sensors, location/task/function - GF54.65-P-4102R: Notes

MODEL 230 with CODE (220a) Parktronic system (PTS) 

Fig 1: Identifying Front And Rear Sensor
G05075977Courtesy of MERCEDES-BENZ USA

IMPORTANT There are several versions of the sensors depending on vehicle model/model year. Sensors of different versions must not be installed together in the same vehicle.

A defective seating or mechanical damage to the sensors or an incorrect version of the sensor may cause faults or incorrect displays.

  Sensors, location   GF54.65-P-4102-01R 
  Sensors, task The sensors both send and receive ultrasonic signals for measuring the distance of obstacles in relation to the vehicle.  
  Sensors, function The sensor actuated by the control module emits an ultrasonic signal and is ready to receive after a short delay (the time necessary for the membrane oscillations to decay).
Each sensor receives the echoes of its own ultrasound signals as well as the echoes of the ultrasound signals from neighboring sensors. The distance to the obstacle is calculated from the journey time of the echoes.
Angle:
Horizontal: 120°
Vertical: 60°