Mercedes-Benz ML320. Manual — part 682

ENGINE AND AC ELECTRIC SUCTION FAN WITH INTEGRATED CONTROL, FUNCTION - GF83.40-P-2172-01GI

Function

Depending on the refrigerant pressure and/or on the coolant temperature the speed of the engine and AC electric
suction fan with integrated control (M4/7) is increased infinitely.

The engine and AC electric suction fan with integrated control (M4/7) receives the coolant temperature from the
coolant temperature sensor (B11/4) and the refrigerant pressure from the refrigerant pressure and temperature
sensor (B12/2).

This input information is compared by the engine and AC electric suction fan with integrated control (M4/7)
with the stored values and, if necessary, the speed of the engine and AC electric suction fan is increased to 100
%

The engine and AC electric suction fan with integrated control (M4/7) operates with AC switched on and in the
reheat mode for basic ventilation with a capacity of up to 20 %.

The basic ventilation can be switched off under the following conditions:



At an outside temperature of < or = 15°C.

The pressure-dependent fan speed remains the same.



At a driving speed of > 75 km/h.

The pressure-dependent fan speed remains the same.

An overrun time of 60 s can be set in order to ensure that the engine and AC electric suction fan with integrated
control (M4/7) will continue to operate even where the refrigerant compressor is temporarily switched off by
the icing protection.

The engine and AC electric suction fan with integrated control (M4/7) has a power rating of 850 W.

ELECTRIC SUCTION-TYPE FAN FOR ENGINE AND AC WITH INTEGRATED CONTROL, LOCATION/TASK/FUNCTION
- GF83.40-P-2172GI

MODEL 163 as of 1.9.01 with ENGINE 113.965 /981, 612.963, 628.963 with CODE (580a) Automatic air
conditioning

MODEL 163 as of 1.9.01 up to 31.8.02 with ENGINE 113.942 with CODE (580a) Automatic air
conditioning

and temperature sensor,
function

GF83.40-P-
2171-01GI

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

Fig. 96: Identifying Electric Suction-Type Fan For Engine And AC With Integrated Control

BUTTON FOR REAR AREA AIR DISTRIBUTION, LOCATION/TASK/FUNCTION - GF83.40-P-2173GI

MODEL 163 as of 01.09.01 with CODE (580a) Automatic air conditioning

Electric suction-type fan for
engine and AC with integrated
control, location

Electric suction-type fan for
engine and AC with integrated
control, task

The electric suction-type fan for engine and AC with
integrated control (M4/7) is used to cool down the
coolant and the refrigerant.

Electric suction-type fan for
engine and AC with integrated
control, function

GF83.40-P-
2172-01GI

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

Fig. 97: Identifying Button For Rear Area Air Distribution And Air Distribution Switch

SURVEY OF AUTOMATIC AIR CONDITIONING SYSTEM COMPONENTS, LOCATION/PURPOSE/DESIGN/FUNCTION -
GF83.40-P-9990GI

MODEL 163 as of 1.9.01 with code (580a) Automatic air conditioning

Button for rear area air
distribution, location

The button for rear area air distribution (

) is located in the center in the

lower half of the air distribution switch (3) on the AAC push-button control
module (N22).

Button for rear area air
distribution, task

The button for rear area air distribution (

) blocks the rear blow-out ducts

for ventilation.

Button for rear area air
distribution, function

By pressing the button for rear area air distribution (

) the rear air

distribution flap actuator motor (M2/21) is actuated and thus the air supply to
the air duct for rear area ventilation is closed.
Function feedback takes place by means of a red LED.

Air inlet, location/function

GF83.10-P-
2138GC

Air ducts, location/purpose/design

GF83.10-P-
2139GH

Rear vent, location/purpose/function

GF83.10-P-
2143GC

Defroster vent, location/purpose/function

GF83.10-P-
2144GC

Center nozzle, location/purpose/function

GF83.10-P-
2149GC

Lateral nozzle, location/purpose/function

GF83.10-P-
2150GC

Rear nozzle, location/purpose/design/function

GF83.10-P-
2151GI

Front footwell air outlet, location/purpose/
function

GF83.10-P-
2145GC

Rear footwell air outlet, location/purpose/

GF83.10-P-

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

function

2146GI

Blower motor,
location/purpose/design/function

GF83.10-P-
2170GI

Blower regulator, location/purpose/function

GF83.10-P-
2141GI

Rear blower motor, location/purpose/design/
function

GF83.10-P-
2168GI

Rear electronic blower regulator, location/
purpose/function

GF83.10-P-
2176GI

Combination filter, location/purpose/function

GF83.10-P-
2128GI

Defroster vent flap actuator motor, location/
purpose/function

GF83.10-P-
2175GI

Footwell flap actuator,
location/purpose/function

GF83.10-P-
2132GI

Actuator motor, center nozzle flap, location/
purpose/function

GF83.10-P-
2172GI

Actuator motor, rear shut-off flap, location/
purpose/function

GF83.10-P-
2171GI

Actuator motor, rear air distribution flap,
location/purpose/function

GF83.10-P-
2173GI

Heating system heat exchanger, location/
purpose/function

GF83.20-P-
2108GC

Heating water circulation pump, location/
purpose/function

GF83.20-P-
2109GI

Fresh air/recirculation flap, location/purpose/
function

GF83.20-P-
2111GC

Fresh air/recirculation flap actuator, location/
purpose/function

GF83.30-P-
2116GC

Blower switch,
location/purpose/design/function

GF83.25-P-
2100GI

Blower button, location/purpose/function

Rear ventilation operating module

GF83.40-P-
2144GI

Air distribution switch,
location/purpose/design/ function

GF83.25-P-
2101GI

Air distribution button,
location/purpose/function

Rear ventilation operating module

GF83.40-P-
2159GI

Temperature selector wheel, location/purpose/
design/function

GF83.25-P-
2102GI

Defroster button, location/purpose/function

GF83.40-P-
2139GI

Recirculating air push-button,
location/purpose/ function

GF83.40-P-
2145GI

GF83.40-P-

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me