Automatic air conditioning pushbutton control module position/function - GF83.40-P-2000A

MODEL 210 with CODE (581a) Air conditioning (Automatic) 

Fig 1: Identifying Automatic Air Conditioning Pushbutton Control Module Position

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function 

The control and operating module (N22) permits performance of adjustments required by the driver, such as:

• Passenger compartment temperature by pressing the warm/cold pushbuttons
• Manual air quantity by pressing the pushbutton +/-
• Manual air distribution by pressing the pushbutton
• Recirculated air by pressing the pushbutton
• Activation of residual engine heat recirculation, with ignition off, by pressing the pushbutton
• Switching off cooling by pressing the pushbutton
• Automatic air distribution and blower speed by pressing the pushbutton
• Defrosting function by pressing the pushbutton
• Switching on the activated charcoal filter by pressing the pushbutton

The driver will be shown these adjustments on the display.

Furthermore the control module integrated into the control and operating (N22) module takes over regulation and control of systems, such as:

• comparison of the preselected / actual temperatures and adjustment of the passenger compartment temperature
• automatic switching from fresh air to recirculated air
• automatic air distribution
• automatic blower speed
• actuation of the refrigerant compressor
• actuation of the auxiliary ventilator

The control and operation module (N22) can be diagnosed so that faults arising are stored in a fault memory, which can be read out onboard or with the aid of the Hand-Held Tester. (DMNL Air conditioning). When changing the control and operating module (N22) a variant coding should be performed with the aid of the Hand-Held Tester.