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Seat ventilation blower regulator, location/task/design/function - GF91.30-P-3102S

MODEL 210 as of 1.7.99, 215, 220 with CODE (401a) Front luxury seat, incl. heated seat and seat ventilation 

MODEL 220 with CODE (402a) Seat ventilation of rear seats 

Location of component shown on the left front seat (MODEL 220): 

Fig 1: Identifying Left Front Seat Ventilation Blower Regulator
G04632704Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  Seat ventilation blower regulator, location The blower regulators for left front seat ventilation (N29/5), right front seat ventilation (N29/6), left rear seat ventilation (N29/3) and right rear seat ventilation (N29/4) are located in the backrest of the respective seat.  
  Seat ventilation blower regulator, purpose The blower regulators for front seat ventilation on left (N29/5)/right (N29/6), as well as for MODEL 220 the blower regulator for rear seat ventilation on left (N29/3)/right (N29/4) boost the actuation voltage from the control module for the motors of the seat ventilation.  
  Seat ventilation blower regulator, design The blower regulators are discrete elements, which are connected between the control module and the motors.  
  Seat ventilation blower regulator, function The blower regulators are designed as non- overloading regulators.