Mercedes-Benz ML320. Service manual - part 662

 

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Mercedes-Benz ML320. Service manual - part 662

 

 

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 end positions flap OPEN and SHUT are defined and retained. 

REAR SHUTOFF FLAP ACTUATOR MOTOR LOCATION/TASK/FUNCTION - GF83.10-P-2171GI 

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

Fig. 28: Identifying Rear Shutoff Flap Actuator Motor 

CENTER OUTLET FLAP ACTUATOR MOTOR - GF83.10-P-2172-01GI 

NOTE:

All actuator motors are identical.

 

Rear shutoff flap 
actuator motor 
location

The rear shutoff flap actuator motor (M2/12) is to the left of the 
automatic air conditioning housing.

 

 

Rear shutoff flap 
actuator motor task

The rear shutoff flap actuator motor (M2/12) operates the rear 
shutoff flap for controlling the flow of air to the rear 
compartment nozzle.

 

 

Rear shutoff flap 
actuator motor 
function

 

GF83.10-P-
2171-01GI

 

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 center outlet flap 
actuator motor (M2/22) via the AC bus. The center outlet flap actuator motor (M2/22) controls the center outlet 
flap, which adopts the following positions according to requirements. 

Switching logic  

center outlet flap closed = 0%  

center outlet flap open = 100%  

Automatic center outlet flap control (Auto button engaged)  

The center outlet flap is opened depending on the following values 

blending air flap setting  

Coolant temperature  

Evaporator temperature  

linear up to 100 % open. 

Center outlet 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 using the Diagnosis Assistant System 
(DAS), i.e. the flap OPEN and SHUT limit positions are defined and retained. 

CENTER OUTLET FLAP ACTUATOR MOTOR, LOCATION/TASK/FUNCTION - GF83.10-P-2172GI 

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

65%

82%

100%

68%

2%

0%

7 o'clock 

8 o'clock 

9 o'clock 

10 o'clock 

11 o'clock 

12 o'clock 

32% 

68% 

100% 

82% 

65% 

50% 

NOTE:

All actuator motors are identical.

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

Fig. 29: Locating Center Outlet Flap Actuator Motor 

REAR AIR DISTRIBUTION FLAP ACTUATOR MOTOR FUNCTION - GF83.10-P-2173-01GI 

Function  

Pressing the rear compartment air distribution button (

 ) on the AAC push-button control module (N22) 

actuates the air distribution flap actuator motor (M2/21) via the AC bus. The air distribution flap actuator motor 
(M2/21) therefore controls the air distribution flap, which opens and controls the air supply to the rear blowout 
ducts. 

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 using the Diagnosis Assistant System 

 

Center outlet flap 
actuator motor location

The center outlet flap actuator motor (M2/22) is to the right of 
the center nozzle air duct, below the instrument panel.

 

 

Center outlet flap 
actuator motor task

The center outlet flap actuator motor (M2/22) operates the 
center outlet flap for controlling the flow of air to the center 
nozzle.

 

 

Center outlet flap 
actuator motor function

 

GF83.10-P-
2172-01GI

NOTE:

All actuator motors are identical.

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

(DAS), i.e. the end positions flap OPEN and SHUT are defined and retained.

REAR AIR DISTRIBUTION FLAP ACTUATOR MOTOR, LOCATION/TASK/FUNCTION - GF83.10-P-2173GI 

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

Fig. 30: Locating Rear Air Distribution Flap Actuator Motor 

DEFROSTER VENT FLAP ACTUATOR MOTOR, FUNCTION - GF83.10-P-2175-01GI 

Function  

Pressing the defroster button (

 ) on the AAC push-button control module actuates the defroster vent flap 

actuator motor (M2/8) via the air conditioner bus. The defroster vent flap actuator motor (M2/8) controls the 
defroster nozzle flaps, which adopt the following positions, according to requirements: 

 

Rear air distribution 
flap actuator motor 
location

The rear air distribution flap actuator motor (M2/21) is to the left 
of the rear blower housing, behind the rear compartment nozzle.

 

 

Rear air distribution 
flap actuator motor 
task

The rear air distribution flap actuator motor (M2/21) operates the 
rear air distribution flap for controlling the flow of air to the rear 
compartment nozzle and the rear footwell air vents.

 

 

Rear air distribution 
flap actuator motor 
function

 

GF83.10-P-
2173-01GI

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

 

 

 

 

 

 

 

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