Automatic heater pushbutton control module position/function

P83.25-2009-11

Shown on model 202

1 Temperature selection wheels

2 Blower switch

3 Air distribution switch

 Recirculated air pushbutton

 Rest push button (in model 202 up to 08/97 only with Code 450, as of 09/97 serial equipment)

N18 Automatic heater control and operating module (HEAT)

Function

The control and operating module (N18) is the centerpiece of the automatic heater (HEAT). It permits performance, of adjustments required by the driver, such as:

 Temperature by using the temperature selection wheels (1)

 Air quantity by using the blower switch (2)

 Air distribution by using the air distribution switch (3)

 Recirculated air by pressing the recirculated air pushbutton
(  )

 Activation of residual engine heat recirculation, with ignition off, by pressing the Rest pushbutton

( ) (Model 202 up to 08/97 by special request)

Furthermore the control module integrated into the control and operation module (N18) takes over the comparison of specified / actual temperature values and adjustment of the preselected passenger compartment temperature.

The control and operation module (N18) can be diagnosed so that faults arising are stored in a fault memory, which can be read out with the aid of the DMNL Air conditioning system