LEMON Manuals: Even more car manuals for everyone
Home >> Mercedes Benz >> 2007 >> SLK55 >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Climate Control -- Basic Knowledge -- 203 Chassis) >> Basic Knowledge >> Convenience automatic air conditioning box, function - GF83.40-P-2170-03P

Convenience automatic air conditioning box, function - GF83.40-P-2170-03P

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.

Heating mode 

Fig 1: Identifying Convenience Automatic Air Conditioning Box - Heating Mode
G04737972

Heating mode with activated charcoal filter function 

Settings: 

Function 

In heating mode, intake air (A) is drawn in by the blower motor (A32m1), corresponding to the position of the fresh air and air recirculation flap. The intake air (A) cleaned by the dust filter (1) is led through the two activated charcoal filters (2) to the evaporator (3), where it is dried and cooled. Subsequently and corresponding to the position of the blend air flaps, the dried and cooled air (B) is routed past the heater heat exchanger (4), through which coolant flows, and is heated up.

Corresponding to the positions of the defroster flaps, the footwell flaps and the fresh air flaps, the heated air (C) is conducted to the respective air outlets.

In addition, cooled air (B) is diverted directly downstream of the evaporator (3) for indirect fresh air supply, this flow being controlled by means of the cold air blending adjustment wheel at the center air outlet.

The defroster flaps are easily opened. In the transition from heating mode to cooling mode (mode change) they are closed.

The condensation water is led to the outside via the condensation drain.

Cooling mode 

Fig 2: Identifying Convenience Automatic Air Conditioning Box - Cooling Mode
G04737973

Cooling mode with activated charcoal filter function 

Settings: 

Function 

In cooling mode, intake air (A) is drawn in by the blower motor (A32m1), corresponding to the position of the fresh air and air recirculation flap. The intake air (A) cleaned by the dust filter (1) is led through the two activated charcoal filters (2) to the evaporator (3), where it is dried and cooled. Subsequently and corresponding to the position of the blend air flaps, the dried and cooled air (B) is routed past the heated heater heat exchanger (4).

Corresponding to the positions of the defroster flaps, the footwell flaps and the fresh air flaps, the dried and cold air (B) is then conducted directly to the respective air outlets.

In addition, cooled air (B) is diverted directly downstream of the evaporator (3) for indirect fresh air supply, this flow being controlled by means of the cold air blending adjustment wheel at the center air outlet.

In cooling mode, the footwell flaps are closed.

The defroster outlet flaps can be open with dry outside air. The other flaps can be operated manually.

In the transition from heating mode to cooling mode (mode change) the footwell flaps are opened.

The condensation water is led to the outside via the condensation drain.

Normal mode 

Fig 3: Identifying Convenience Automatic Air Conditioning Box - Normal Mode
G04737974

Normal mode with activated charcoal filter function 

Settings: 

Function 

In normal mode (EC/AC OFF lit up), intake air (A) is drawn in by the blower motor (A32m1), corresponding to the position of the fresh air and air recirculation flap. The intake air (A) cleaned by the dust filter (1) is led through the two activated charcoal filters (2) to the evaporator (3), where it is dried and cooled. Subsequently and corresponding to the position of the blend air flaps, a portion of the dried and cooled air (B) is heated up at the heater heat exchanger (4) through which coolant flows.

The remaining dried and cooled air is diverted past the heater heat exchanger (4) and is blended with the heated air (C) to form mixed air (D).

Corresponding to the position of the defroster flaps, the footwell flaps and the fresh air flaps, the mixed air (D) is conducted directly to the respective air outlets.

In addition, cooled air (B) is diverted directly downstream of the evaporator (3) for indirect fresh air supply, this flow being controlled by means of the cold air blending adjustment wheel at the center air outlet.

The defroster outlet flaps can be open with dry outside air.

Blended air mode with recirculated air 

Fig 4: Identifying Convenience Automatic Air Conditioning Box - Blended Air Mode With Recirculated Air
G04737975

Mixed air mode with recirculated air and activated charcoal filter function 

Settings: 

Function 

In mixed air mode with recirculated air (EC/AC OFF lit up), intake air (A) is drawn in by the blower motor (A32m1), corresponding to the position of the fresh air and air recirculation flap. This is led through the two activated charcoal filters (2) to the evaporator (3) and is dried and cooled there. Subsequently and corresponding to the position of the blend air flaps, a portion of the dried and cooled air (B) is routed past the heater heat exchanger (4), through which coolant flows, and is heated up.

The remaining dried and cooled air (B) is diverted past the heater heat exchanger (4) and is blended with the heated air (C) to form mixed air (D).

Corresponding to the position of the defroster flaps, the footwell flaps and the fresh air flaps, the mixed air (D) is conducted to the respective air outlets.

In addition, cooled air (B) is diverted directly downstream of the evaporator (3) for indirect fresh air supply, this flow being controlled by means of the cold air blending adjustment wheel at the center air outlet.

The defroster outlet flaps can be open with dry outside air.

Blended air mode without activated charcoal filter 

Fig 5: Identifying Convenience Automatic Air Conditioning Box - Blended Air Mode Without Activated Charcoal Filter
G04737976

Mixed air mode without activated charcoal filter function 

Settings: 

Function 

In mixed air mode without activated charcoal filter, intake air (A) is drawn in by the blower motor (A32m1), corresponding to the position of the fresh air and air recirculation flap. The intake air (A) cleaned by the dust filter (1) is led past the two activated charcoal filters (2) to the evaporator (3), where it is dried and cooled. Subsequently and corresponding to the position of the blend air flaps, a portion of the dried and cooled air (B) is routed past the heater heat exchanger (4), through which coolant flows, and is heated up.

The remaining dried and cooled air (B) is diverted past the heater heat exchanger (4) and is blended with the heated air (C) to form mixed air (D).

In addition, cooled air (B) is diverted directly downstream of the evaporator (3) for indirect fresh air supply, this flow being controlled by means of the cold air blending adjustment wheel at the center air outlet.

Corresponding to the positions of the defroster flaps, the footwell flaps and the fresh air flaps, the mixed air (D) is conducted to the respective air outlets.

The defroster outlet flaps can be open with dry outside air.