GL 550 (164.886) V8-5.5L (273.963) (2008)
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Evaporator temperature
^
Footwell flap position
Air flap control via the center nozzle
In manual mode the air flap settings are determined by the selector on the center nozzle.
Left blending air flap actuator motor and right blending air flap actuator motor
The left blending air flap actuator motor and the right blending air flap actuator motor are used to set the ventilation temperature of the heater and the air
conditioning separately for left and right. The actuator motors of the blending air flaps are actuated via the comfort automatic air conditioning control
and operating unit depending on the temperature buttons selected and the actual interior temperature according to defined characteristics and move the
blending air flaps. The flaps open or close the passage of air through the heating system heat exchanger in order to mix hot air with fresh air or cooled air
in order to achieve the desired in-car temperature.
The specified flap angles of the blend air flaps are determined by the comfort automatic air conditioning control and operating unit as a function of the
following information:
^
Regulated target temperature on the temperature selector wheel
^
The in-car temperature measured by the in-car temperature sensors
^
Coolant temperature
Blend air flaps closed
No air flows through the mixing chamber and thus no heating of the air
Blend air flaps open
All air flows through the mixing chamber with maximum heating of air
Left defroster vent flap actuator motor and right defroster vent flap actuator motor
The left defroster vent flap actuator motor and the right defroster vent flap actuator motor operate the particular defroster vent flap that controls the air
flow to the windshield defroster vent and the side window defroster vents separately for each side. By pressing the window defrost switch on the comfort
AAC control and operating unit, the defroster vent flap actuator motors are actuated and the defroster vent flaps are operated, which then adopt the
following positions at various requirements:
Actuation during "Defrosting" Defroster vent flap open 100 %.
Actuation during "0"
Defroster vent flap open 100 %.
Manual flap control
(division as clock by actuating the air distribution wheel)
1 o'clock
2 o'clock
3 o'clock
4 o'clock
5 o'clock
6 o'clock
100 %
100 %
100 %
67 %
21 %
0 %
7 o'clock
8 o'clock
9 o'clock
10 o'clock 11 o'clock 12 o'clock
0 %
0 %
0 %
23 %
65 %
100 %
Automatic flap control
The defroster vent flaps are opened in line with the following variables linear up to 100 %:
^
Blending air flap setting
^
Coolant temperature
^
Evaporator temperature
^
Relative humidity
Left footwell flap actuator motor and right footwell flap actuator motor
The left footwell flap actuator motor and the right footwell flap actuator motor operate the particular footwell flap that controls the air flow to the front
footwell and the rear legroom separately for each side.
By pressing the footwell air distribution button in the comfort AAC control and operating unit, the left footwell flap actuator motor and the right footwell
flap actuator motor are actuated. The footwell flaps adopt the following positions at various requirements:
Actuation during "Defrosting" Footwell flaps 0 % (closed)
Actuation during "Rest"
According to regulation
Actuation during "0"
No change
Manual flap control
(division as clock by actuating the air distribution wheel)
1 o'clock
2 o'clock
3 o'clock
4 o'clock
5 o'clock
6 o 'clock
29%
72 %
100 %
100 %
100 %
100 %
