E 320 BLUETEC (211.022) V6-3.0L DSL Turbo (642.920) (2007)
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Air flap control via the center nozzle
In manual mode the air flap settings are determined by the selector on the center nozzle.
Blending air flap actuator motor left (M2/6) and blending air flap actuator motor right (M2/7)
The left blend air flap actuator motor (M2/6) and right blending air flap actuator motor (M2/7) are used to set the ventilation temperature of heater and
air conditioning separately for left and right.
The left blending air flap actuator motor (M2/6) and right blending air flap actuator motor (M2/7) are actuated by the comfort AAC control and
operating module (N22/7) and AC bus depending on the temperature buttons selected and the actual interior temperature according to defined
characteristics and move the blend 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 AAC control and operating module (N22/7) depending upon the following
information:
^
selected specified temperature at the temperature selector wheel
^
measured interior temperature at the in-car temperature sensors (B10/4, N70b1)
^
Coolant temperature
blending air flaps closed
no air 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 (M2/8) and right defroster vent flap actuator motor (M2/9)
The left defroster flap actuator motor (M2/8) and right defroster flap actuator motor (M2/9) operate the defroster nozzle flaps for controlling the air flow
to the windshield defroster nozzle and side window defroster nozzles. By pressing the window defrost switch (N22/7s3) on the comfort AAC control and
operating module (N22/7) the left defroster vent flap actuator motor (M2/8) and right defroster vent flap actuator motor (M2/9) is actuated via the AC
bus and operates the defroster vent flaps, which assume the following positions for various requirements
Actuation at "defrosting"
defroster nozzle flaps 100 % open
Actuation at "0"
defroster nozzle flaps 100 % open
Manual flap control
(12 o'clock partitioning through actuation of air distributor duct button)
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 depending on the following values
^
Blend air flap position
^
Coolant temperature
^
Evaporator temperature
^
Relative humidity, value of C-AAC sun sensor (4 in total) (B32/2)
linear up to 100 % open.
Left footwell flap actuator motor (M2/10) and right footwell flap actuator motor (M2/11)
The left footwell flap actuator motor (M2/10) and right footwell flap actuator motor (M2/11) operate the footwell flap that controls the air flow to the
front footwell and rear legroom separately for each side.
By pressing the air distribution wheel of the comfort AAC control and operating module (N22/7) the left footwell flap actuator motor (M2/10) and right
footwell actuator motor (M2/11) are actuated via the AC bus and therefore operate the footwell flaps, which assume the following positions for various
requirements:
Actuation at "defrost"
footwell flaps 0 % (closed)
actuation at "REST"
in accordance with regulation
actuation at "0"
no change
Manual flap control
(12 o'clock partitioning through actuation of air distributor duct button)
1 o'clock
2 o'clock
3 o'clock
4 o'clock
5 o'clock
6 o'clock
