Regulation of automatic air conditioning, function - GF83.40-P-2004P

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2007 Mercedes-Benz C350, 2007 Mercedes-Benz C280, 2007 Mercedes-Benz C230, 2006 Mercedes-Benz C55, and 2006 Mercedes-Benz C350. However, it is still accessible from the selected car via links, so may be relevant.

MODEL 203.0 /2 /7 up to 31.5.01 with CODE (580) Air conditioning (or Tempmatic for USA)

MODEL 203.0 /2 /7 as of 1.6.01 with CODE (580) Automatic air conditioning

MODEL 203.0 /2 /7 as of 24.4.04 except CODE (581) Comfort automatic air conditioning

Fig 1: Regulation Of Automatic Air Conditioning - Function Diagram

The electronic control and regulation of interior temperature, air volume and air distribution is performed by the AAC [KLA] control and operating unit (N22) depending on the preselected settings and the following information:

Interior temperature, detected by the in-car temperature sensor in the AAC [KLA] control and operating unit (N22) and additionally by the in-car temperature sensor in the overhead control panel control unit (N70) (up to 31.5.02 and as from 1.6.05)
Position of the tilting/sliding roof (SHD) (for model 203.0/2 with code (414) Power glass tilting/sliding roof) or panoramic tilting/sliding roof (for model 203.7 with code (413) Panoramic sliding roof), read in by overhead control panel control unit (N70)
Position of windows, read in by door control units (N69/1, N69/2, N69/3, N69/4)
Air humidity, captured by the air humidity sensor (up to 28.6.06), read in by the AAC [KLA] control and operating unit (N22)
Ambient temperature, detected by outside temperature display temperature sensor, read in by front SAM control unit with fuse and relay module (N10/1)
Battery voltage, coolant temperature and engine speed, read in by EIS [EZS] control unit (N73)
Ground speed, read in via instrument cluster (A1)
Pressure and temperature of refrigerant, detected by refrigerant pressure and temperature sensor, read in by front SAM control unit with fuse and relay module (N10/1)
Evaporator temperature, detected by evaporator temperature sensor, read in by AAC [KLA] control and operating unit (N22)

Control and operating unit for automatic air conditioning, location/task	On vehicles up to 23.4.04	GF83.40-P-2180PP
	On vehicles as from 24.4.04 without code (581) Comfort automatic air conditioning	GF83.40-P-2180PQ
Front SAM control unit with fuse and relay module, location/task/design		GF54.21-P-4108PP
Front driver side door control unit, location/task/ design/function		GF72.29-P-4105PP
Front passenger door control unit, location/task/ design/function		GF72.29-P-4106PP
Rear door control unit, location / task / design / function	for model 203.0/2	GF72.29-P-4102PP
Electronic ignition switch control unit, location/ task/design/function		GF80.57-P-4102PP
Overhead control panel control unit, location/ task/design		GF82.20-P-4110A