R 350 4MATIC (251.165) V6-3.5L (272.967) (2006)
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Component Identification
Location
The AAC control and operating unit is located on the instrument panel.
Design
The AAC control and operating unit contains the following controls and displays:
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Temperature adjusting ring for driver-side (1)
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Automatic button (2)
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Window defrost button (3)
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Increase air volume button (4)
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Headroom air distribution button (5)
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REAR OFF button (6)
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Passenger side temperature dial (7)
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A/C OFF REST button (8)
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Center air distribution button (9)
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Footwell air distribution button (10)
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Air volume indicator (11)
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Reduce air volume button (12)
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Heated rear window switch (N22s1)
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Air recirculation switch (N22s2)
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In-car temperature sensor (N22b1)
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OFF button (14)
The AAC control and operating unit allows the following control actuations:
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Switching the air conditioning system on and off
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Interior compartment temperature selection cold/warm separate for left and right
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Manual blower control
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Manual air distribution
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Automatic blower control and air distribution
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Air recirculation mode
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Defrost function
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Rear window heater
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Residual engine heat utilization system
The AAC control and operating unit takes over control of the following:
Discreet:
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Coolant circulation pump (M13)
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Refrigerant compressor (A9)
