Mercedes-Benz ML320. Service manual - part 659

 

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Mercedes-Benz ML320. Service manual - part 659

 

 

The series resistor assembly (R14) is comprised of three resistors which can be interconnected, via series 
connection, to form an overall resistor. Depending on the setting of the blower switch, current is guided via the 
resistors assigned to the set blower level to the blower (M2). Different control voltages are therefore present at 
the blower (M2), as a result of which the blower (M2) operates at different rotational speeds. 

COMBINATION FILTER, LOCATION/TASK/DESIGN/FUNCTION - GF83.10-P-2128GI 

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

Fig. 20: Identifying Combination Filter 

FOOTWELL FLAP ACTUATOR MOTOR, FUNCTION - GF83.10-P-2132-02GI

Pin assignment of series resistor assembly 

R14

Assigned 

resistor

Blower switch 

setting

Blower (M2) control 

voltage

Pin 1

R3

Blower level 3

10V

Pin 2

R2+R3

Blower level 2

8V

Pin 3

R1+R2+R3

Blower level 1

4V

Pin 4

None

Blower level 4

12V

 

Combination 
filter location

The combination filter (1) is at the bottom of the automatic air conditioning box.

 

 

Combination 
filter task

The combination filter (1) removes impurities and odors from the air flowing through 
the automatic air conditioning box. Fresh air and recirculating air are filtered.

 

 

Combination 
filter design

The combination filter (1) consists of fleece and a large number of so-called sliver 
absorbers that are evenly distributed over an air-permeable carrier mat.

 

 

Combination 
filter function

The combination filter (1) filters over 80% of particles from 0.3 in size and up to 
100% of 0.5 u sized particles and pollen. The sliver adsorbers also continuously 
absorb odors and pollutants and release them again in extremely small concentrations 
after a certain time.

 

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

Function  

Rotating the air distribution switch in the AAC push-button control module (N22) actuates the footwell flap 
actuator motor via the AC bus. The footwell flap actuator motor (M2/21) controls the footwell flap, which 
adopts the following positions according to requirements. 

Switching logic  

footwell flap closed = 0%  

footwell flap open = 100%  

Automatic footwell flap control (Auto button engaged)  

The footwell flap is opened depending on the following values 

blending air flap setting  

Coolant temperature  

Evaporator temperature  

linear up to 100 % open. 

Footwell flap control via push-button control module  

(Clock type switch setting of air distribution switch)  

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 replacing an actuator motor an adjustment run must be performed via the Diagnosis Assistant System 
(DAS), i.e. the flap OPEN and SHUT limit positions are defined and retained. 

FOOTWELL FLAP ACTUATOR MOTOR, LOCATION / TASK / FUNCTION - GF83.10-P-2132GI 

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

1 o'clock

2 o'clock

3 o'clock

4 o'clock

5 o'clock

6 o'clock

17%

32%

50%

68%

85%

100%

7 o'clock

8 o'clock

9 o'clock

10 o'clock

11 o'clock

12 o'clock

66%

31%

0%

%

0%

0%

NOTE:

All actuator motors are identical.

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

Fig. 21: Identifying Footwell Flap Actuator Motor 

AIR INLET, LOCATION/FUNCTION - GF83.10-P-2138GC 

MODEL 163, 168  

AIR DUCTS, LOCATION/TASK/DESIGN - GF83.10-P-2139GH 

MODEL 163  

 

Footwell flap actuator 
motor, location

The footwell flap actuator motor (M2/15) is on the left on the 
automatic air conditioning box.

 

 

Footwell flap actuator 
motor, task

The footwell flap actuator motor operates the footwell flap for 
regulating the air flow to the front footwell.

 

 

Footwell flap actuator 
motor, function

 

GF83.10-P-
2132-02GI

 

Air inlet, location

Model 168

GF83.10-P-2100-01GC

 

 

Model 163

  
GF83.10-P-2100-01GH

 

Air inlet, function

The fresh air required for 
ventilation flows through 
the air inlet to the 
heater/air conditioning 
housing.

 

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

Design shown up to 31.08.01  

Fig. 22: Identifying Air Ducts - Design Shown Up To 31.08.01 

BLOWER REGULATOR, LOCATION / TASK / FUNCTION - GF83.10-P-2141GI 

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

 

Air duct 
locations

up to 31.08.01

GF83.10-P-
2101-01GH

   

as of 1.09.01

GF83.10-P-
2101-01GI

 

Air ducts 
task

The air ducts (1-5) lead the air that is required to ventilate the vehicle 
from the heater/ evaporator housing to the air vents in the vehicle 
interior.

 

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

 

 

 

 

 

 

 

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