GL 450 (164.871) V8-4.6L (273.923) (2007)
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[KLA] control and operating unit or on the RCP [HBF] control unit (N72/2).
Function
The comfort AAC [KLA] control and operating unit sends a control voltage of 0 to 100 % to the rear air conditioning blower regulator. This then
regulates the operating voltage for the blower motor depending on the control voltage applied from 0 to 100 %. This facilitates control of the blower
motor speed from 0 - 100 %.
The blower motor regulator (operating voltage) is influenced by the following factors:
^
Blower output setting (AUTO/manual)
^
AC OFF (ON/OFF)
^
Mode status (heating, cooling)
^
Coolant temperature
^
Position of windows, tilting/sliding roof or panoramic sliding roof
^
Vent windows position
^
Outside temperature
^
Air humidity (dew point)
^
Pollutant concentration
^
Flap positions (air distribution)
^
Residual engine heat utilization function, stationary ventilation function
^
Version coding
