Mercedes-Benz ML320. Manual — part 672

Control of fresh air/recirculated air flap via the AAC push-button control module (N22)

When the recirculating air push-button is pressed (

) on the AAC push-button control module the system is

switched by means of the fresh air/recirculated air flap actuator motor straight to 100 % recirculation air. This is
displayed by the function LED.

If a problem exists, it is possible to retrieve and verify the defined end positions by means of the diagnosis
assistant system (DAS) (valuation trip).

After replacement of an actuator motor it is necessary for an adjustment run to be performed using the diagnosis
assistant system (DAS), i.e. the end positions flap OPEN and SHUT are defined and retained.

AIR CONDITIONING FLUID RESERVOIR, LOCATION - GF83.30-P-2106-01GH

The fluid reservoir (6) is located in the left front of the engine compartment, next to the condenser.

Fig. 66: Identifying Air Conditioning Fluid Reservoir And Associated Components

AIR CONDITIONING FLUID RESERVOIR, FUNCTION - GF83.30-P-2106-02GC

Function

NOTE:

The recirculated air function can be terminated after a set time-out in
accordance with country specifications.

NOTE:

All actuators are identical.

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

The liquefied refrigerant is routed under pressure into the fluid reservoir and flows through a stainless steel
meshing to the filter block. The pores in the filter block are matched precisely to the refrigerant's molecular size.
Thus the refrigerant can flow through the filter block.

All other matter, primarily water, is held back by this molecular filter and deposited. The cleaned refrigerant
flows over a rising pipe to the expansion valve.

Whenever the system is opened, the fluid reservoir should be replaced because of the water which has

collected there in the meantime.

ALL-ACTIVITY MODULE, LOCATION - GF83.30-P-2108-02GH

The all-activity module (AAM) (N10) is located in the left-hand side of the engine compartment. It is plugged
on from below to the fuse and relay module (F1).

Fig. 67: Identifying All-Activity Module And Relay Module

FRESH AIR/RECIRCULATED AIR FLAP ACTUATOR, LOCATION/TASK/FUNCTION - GF83.30-P-2116GC

MODELS 163 up to 31.8.01, 168 up to 28.2.01 with CODE (580) Air conditioning or Tempmatic for USA

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

Shown on model 163 as of 1.09.01

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

Fig. 68: Identifying Fresh Air/Recirculated Air Flap Actuator - Shown On Model 163 As Of 1.09.01

EVAPORATOR HOUSING, LOCATION/TASK/FUNCTION - GF83.30-P-2119GH

MODEL 163 up to 31.8.01 with CODE (580) Air conditioning or Tempmatic for USA

Fresh air/recirculated air
flap actuator, position

The fresh air/recirculated air flap actuator (M2/5) is
located on the side of the air inlet duct of the air
conditioner housing.

Model 168

GF83.30-P-
2105-01GC

Model 163, up to 31.08.01

GF83.30-P-
2105-01GH

Fresh air/recirculated air
flap actuator, task

The fresh air/recirculated air flap actuator serves to cut off
the supply of fresh air when required.

Fresh air/recirculated air
flap actuator, function

Model 168

GF83.30-P-
2105-02GC

Model 163, up to 31.08.01

GF83.30-P-
2105-02GH

Model 163 as of 1.09.01

GF83.30-P-
2105-02GI

Evaporator housing,
location

GF83.30-P-2104-
01GH

GF83.30-P-2104-

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

AIR CONDITIONING FLUID RESERVOIR, LOCATION/TASK/FUNCTION - GF83.30-P-2120GC

MODELS 163 up to 31.8.01

168 up to with code (580) Air conditioning or Tempmatic for USA

OVERVIEW OF AIR CONDITIONING (TAC) SYSTEM COMPONENTS, LOCATION/PURPOSE/DESIGN/FUNCTION -
GF83.30-P-9999GI

MODEL 163 up to 31.8.01 with CODE (580a) Automatic air conditioning

Evaporator housing, task

04GH

Evaporator housing,
function

GF83.30-P-2104-
02GH

At maximum heating mode in vehicles with engine
612.963 only

GF83.30-P-2104-
02GK

Fluid reservoir (TAC),
location

Model 168

GF83.30-P-2106-
01GC

Model 163

GF83.30-P-2106-
01GH

Fluid reservoir (TAC),
task



Filtering chemical and mechanical impurities out
of the refrigerant



Volume accumulator for refrigerant



Draining of refrigerant

Fluid reservoir (TAC),
function

GF83.30-P-2106-
02GC

Air inlet, location/function

GF83.10-P-
2138GC

Air ducts, location/purpose/design

GF83.10-P-
2139GH

Blower, location/purpose/design/function

GF83.10-P-
2102GC

Series resistor group, location/purpose/function

GF83.10-P-
2161GC

Dust filter, location/purpose/function

GF83.10-P-
2142GH

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

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me