GF83.40-P-2105-02GI Automatic air conditioning box function

Operating condition: Air ducting under heater operation

A Fresh airB Dried (cooled, filtered) airC Warm air

E Defroster flapF Footwell flapFR Rear compartment shut-off valveM Center nozzle and lateral nozzlesS Defroster vent for side windows

1 Heating system heat exchanger2 Evaporator3 Combination filter4 Fresh air/recirculated air flap5 Blower motor6 Blending air flaps

P83.40-2318-76

Operating condition: HEATINGFunction

The dried, cooled and filtered air (B) is then heated up again in the When in heating mode, the blower motor (5) draws in fresh air (A) hot heat exchanger (1). The warm air (C) is routed via the air to the automatic air conditioning box and routes it through the outlets (E, F, FR, M and S) into the vehicle interior.multipurpose filter (3). The air cleaned by the multipurpose filter (3) The fresh air/recirculated air flap (4) is closed.is then routed to the evaporator core (2) and dried there. The dried,

cooled and filtered air (B) is then routed on through the heat exchanger (1). This air conduction is controlled via the setting of the blending air flaps (6).

Operating condition: Air ducting in cooling modeA Fresh airB Dried (cooled, filtered) air

E Defroster flapF Footwell flapFR Rear compartment shut-off valveM Center nozzle and lateral nozzlesS Defroster vent for side windows

1 Heating system heat exchanger2 Evaporator3 Combination filter4 Fresh air/recirculated air flap5 Blower motor6 Blending air flaps

P83.40-2319-76Operating condition: cooling.Function

The dried, cooled and filtered air (B) is routed directly into the When in cooling mode, the blower motor (5) draws in fresh air (A) passenger compartment via the air outlets (E, F, FR, M and S).to the automatic air conditioning box and routes it through the The fresh air/recirculated air flap (4) is closed.multipurpose filter (3). The air cleaned by the multipurpose filter (3)

is then routed to the evaporator core (2) and dried there. The dried, cooled and filtered air (B) is then routed around the heat exchanger (1). This air conduction is controlled via the setting of the blending air flaps (6).Copyright Daimler AG 6/8/11 G/06/08. This WIS printout will not be recorded by the update service. Page 1

Operating condition: Air ducting in blending mode (hot/cold) closed-loop operation

A Fresh airB Dried (cooled, filtered) airC Warm airD Blending air

E Defroster flapF Footwell flapFR Rear compartment shut-off valveM Center nozzle and lateral nozzlesS Defroster vent for side windows

1 Heating system heat exchanger2 Evaporator3 Combination filter4 Fresh air/recirculated air flap5 Blower motor6 Blending air flaps

P83.40-2320-76Operating condition: Blend air (warm/cold)Function

The dried, cooled and filtered air (B) which was routed through the When in blending mode, the blower motor (5) draws in fresh air (A) heat exchanger (1) is then heated up again. After passing through to the automatic air conditioning box and routes it through the the blending air flaps (6) this heated air (C) is mixed up to form multipurpose filter (3). The air cleaned by the multipurpose filter (3) blend air (D) with the dried, cooled and filtered air, which was is then routed to the evaporator core (2) and dried there. Some of routed around the heat exchanger (1). This blend air (D) is then the dried, cooled and filtered air (B) is routed onwards by the heat routed via the air outlets (E, F, FR, M and S) into the passenger exchanger (1) and some is routed around the heat exchanger (1). compartment.This air conduction is controlled via the center setting of the The fresh air/recirculated air flap (4) is closed.blending air flaps (6).

Operating condition: Air ducting "recirculation air" in cooling modeA Recirculated airB Dried (cooled, filtered) air

E Defroster flapF Footwell flapFR Rear compartment shut-off valveM Center nozzle and lateral nozzlesS Defroster vent for side windows

1 Heating system heat exchanger2 Evaporator3 Combination filter4 Fresh air/recirculated air flap5 Blower motor6 Blending air flaps

P83.40-2321-76Operating condition: Cooling down "recirculation air"FunctionIn cooling mode with recirculated air, the blower motor (5) draws in

The dried, cooled and filtered air (B) is routed directly into the recirculated air (A) from the passenger compartment via the opened passenger compartment via the air outlets (E, F, FR, M and S).fresh air/recirculated air flap (4) into the automatic air-conditioning The supply of fresh-air is cut off by the fresh air/recirculation flap box and routes it through the multipurpose filter (3). The air cleaned (4).by the multipurpose filter (3) is then routed to the evaporator core

(2) and dried there. The dried, cooled and filtered air (B) is then routed around the heat exchanger (1). This air conduction is controlled via the setting of the blend air flap (6).Copyright Daimler AG 6/8/11 G/06/08. This WIS printout will not be recorded by the update service. Page 2