1997 MERCEDES-BENZ ML500 ESP

ENGINE 111, 112, 271, 272, 611, 612, 646 in MODEL 203.7 with CODE (580) Air conditioning (or
Tempmatic for USA) with CODE (580) Automatic air conditioning with CODE (581) Automatic air
conditioning with CODE (581) Comfort automatic air conditioning
ENGINE 112.942 /970, 113.942 /965 /981, 612.963, 628.963 in MODEL 163 as of 1.9.01 with CODE (580)
Automatic air conditioning
ENGINE 112, 113, 271, 272, 273, 612, 642, 646 in MODEL 209.3
ENGINE 112, 113, 271, 272, 273, 642 in MODEL 209.4
Shown on model 203
Fig. 105: Identifying Refrigerant Compressor
- Shown On Model 203
ELECTROMAGNETIC CLUTCH, FUNCTION - GF83.55-P-2101-01A
Electromagnetic clutch (A9k1)
Refrigerant compressor,
positionThe refrigerant compressor (A9) is flange-mounted to the
left front of the engine.
Model 163GF83.55-P-2100-
01GH
Refrigerant compressor,
taskThe refrigerant compressor (A9) is responsible for induction
and compression of the refrigerant.
Refrigerant compressor,
design GF83.55-P-2100-
03P
Refrigerant compressor,
function GF83.55-P-2100-
02P

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:16 PMPage 127 © 2006 Mitchell Repair Information Company, LLC.

TEMPERATURE CONTROL, FUNCTION - GF83.57-P-2000GI
MODEL 163 as of 01.09.01 with CODE (580a) Automatic air conditioning
Function
The electronically controlled cooling, heating and ventilation system of the automatic air conditioning achieves
the desired in-car temperature as rapidly as possible or maintains it constantly.
The following options are available for this purpose:
the evaporator cooling the air
the heating system heat exchanger heating the air
Temperature control
The temperature values needed for the temperature control are determined by the in-car temperature sensors
(N22b1), center nozzle air stream (B10/24), footwell at front (B10/25), rear (B10/7), outside temperature
indicator (B14) and defroster protection (R35).
The electronics of the AAC push-button control module (N22) compare the various test values with the
temperature preselected at the temperature selector wheel.
As required, the automatic air conditioning performs the regulation in that in heating mode it controls the
position of the blending air flaps, via the blending air flap actuator motor (M2/6), or in cooling mode it actuates
the refrigerant compressor and thus keeps the respective setting constant.
CDI control module, location/task/function Engine 612.963GF07.16-P-
3102IA
Temperature selector wheel, location/task/ design/function GF83.25-P-
2102GI
Heating system heat exchanger, location/ purpose/function GF83.20-P-
2108GC
Evaporator, location/purpose/design/function GF83.40-P-
2121GC
Expansion valve, location/task/design/function GF83.40-P-
2123GC
Refrigerant compressor, location/task/design/ function GF83.55-P-2100P
Control valve, location/task/function GF83.55-P-2102P
In-car temperature sensor, location/task/function GF83.57-P-
2115GI
Center nozzle air stream temperature sensor,
location/task/function GF83.57-P-
2116GI
Front footwell air stream temperature sensor, GF83.57-P-

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 139 © 2006 Mitchell Repair Information Company, LLC.

IN-CAR TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2115GH
MODEL 163 up to 30.11.99 with CODE (580) Air conditioning or Tempmatic for USA with suction jet
nozzle
IN-CAR TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2115GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning
Fig. 125: Identifying Interior Air Temperature Sensor

CENTER NOZZLE VENT AIR TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2116GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning

In-car
temperature
sensor, location
GF83.57-P-
2115-01GH

In-car
temperature
sensor, taskThe in-car temperature sensor (B10/4) with suction jet nozzle records
the interior temperature and conveys this to the AAC push-button
control module. The suction jet nozzle ensures air from the vehicle
interior flows evenly around the in-car temperature sensor (B10/4).


In-car
temperature
sensor, function
GF83.57-P-
2115-02GH
In-car temperature
sensor, locationThe in-car temperature sensor (N22b1) is located below in the temperature selector
wheel of the AAC push-button control module.
In-car temperature
sensor, taskThe in-car temperature sensor (N22b1) records the in-car temperature and sends it
to the AAC push-button control module (N22).
In-car temperature
sensor, function
The recorded in-car temperature value is compared by the AAC push-button control
module with the setting in the temperature selector wheel whereupon it authorizes a
corresponding adjustment to the blending air flap to be made depending upon the
result.


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 148 © 2006 Mitchell Repair Information Company, LLC.

Fig. 126: Identifying Center Nozzle Vent Air Temperature Sensor
FRONT FOOTWELL VENT AIR TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2117GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning

Center nozzle vent air
temperature sensor,
locationThe center nozzle vent air temperature sensor (B10/24) is located to the left of
the air duct's center nozzle below the instrument panel.

Center nozzle vent air
temperature sensor,
taskThe center nozzle vent air temperature sensor (B10/24) records the temperature
of the air flowing out of the center nozzle and sends it to the AAC push-button
control module (N22).


Center nozzle vent air
temperature sensor,
functionThe vent air's recorded temperature value is compared by the AAC push-button
control module (N22) with the setting in the temperature selector wheel
whereupon it authorizes a corresponding adjustment to the blending air flap to
be made depending upon the result.


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 149 © 2006 Mitchell Repair Information Company, LLC.

Fig. 127: Identifying Front Footwell Vent Air Temperature Sensor
REAR AIR STREAM TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2118GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning

Front footwell vent air
temperature sensor,
locationThe front footwell vent air temperature sensor (B10/25) is located to the left of
the automatic air conditioning box below the instrument panel.

Front footwell vent air
temperature sensor,
taskThe front footwell vent air temperature sensor (B10/25) records the temperature
of the air flowing in the front footwell and sends it to the AAC push-button
control module (N22).


Front footwell vent air
temperature sensor,
functionThe vent air's recorded temperature value is compared by the AAC push-button
control module (N22) with the setting in the temperature selector wheel and
authorizes a corresponding adjustment to the blending air flap to be made
depending upon the result.


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 150 © 2006 Mitchell Repair Information Company, LLC.

Fig. 128: Identifying Rear Air Stream Temperature Sensor
AMBIENT TEMPERATURE DISPLAY TEMPERATURE SENSOR, FUNCTION - GF83.57-P-2119-01GI
Function
The resistance of the ambient temperature display temperature sensor is dependent on the ambient temperature
and speed. The current resistance value is sent via the CAN data bus to the AAC push-button control module
(N22), which then slightly readjusts the set temperature.
The fact that the ambient temperature is dependent on the speed helps to prevent any excess temperature being
sent to the AAC push-button control module (N22) when the car is at a standstill or traveling slowly, e.g. as
induced b
y engine heat radiation.

Rear air stream
temperature sensor,
locationThe rear air stream temperature sensor (B10/7) is located to the left of the rear
passenger compartment blower motor housing behind the rear nozzle.

Rear air stream
temperature sensor,
taskThe rear air stream temperature sensor (B10/7) records the temperature of the air
flowing in the rear passenger compartment and sends it to the AAC push-button
control module (N22).


Rear air stream
temperature sensor,
functionThe recorded temperature value for the rear ventilation air stream is compared by
the AAC push-button control module (N22) with the setting in the temperature
selector wheel and authorizes a corresponding adjustment to the blending air flap
to be made depending upon the result.


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 151 © 2006 Mitchell Repair Information Company, LLC.

Fig. 130: Identifying Fuse And Relay Module, Additional Fan Connector And Plug Connector, Blue
NO REFRIGERATION/HEAT FROM AUTOMATIC AIR CONDITIONER - AF83.40-P-3400A
MODEL 163.### #A as of 289565 up to 458809, 163.### #X as of 754620 up to 777100
Operation no. of operation texts or standard texts and flat rates
If an auxiliary wiring harness (2) has not yet been
installed: ?
3 Install auxiliary wiring harness.SM83.30-P-
0009GH

If an additional wiring harness and a 40 A fuse are
already installed and the auxiliary fan does not
function: ?
4 Perform corresponding diagnosis and repair.

CategoryOp. no.Operation textTimeAcc. no.Code
P831917Replace air conditioning operating unit014 WU--
Damage
codeCauseRemedy
83 491 90The air mixing flap is not actuated by the AAC [KLA]
control and operating unit (N22) because the voltage in
the vehicle electrical system is too low during cold start.
1 Replace AAC [KLA]
control and operating
AR83.40-P-

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 157 © 2006 Mitchell Repair Information Company, LLC.

Commercially available tools
Parts ordering notes
SELF-DIAGNOSTIC SYSTEM
HEATER, DIAGNOSIS, CONTENTS - AD83.20-P-1000GHZ
MODEL 163
DIAGNOSIS TOOLS, HEATER - AD83.20-P-2000-01GC
Commercially available tools

If the actual value changes, there are not faults
present in the automatic air conditioning control
unit.
6 Perform further diagnosis and repair
correspondingly.

If actual value remains unchanged: ?
7 Remove/install/replace automatic air
conditioning control unit.AR83.40-P-
6500GH
8 Install components removed in opposite order.
9 Select "Control module adaptation" with STAR
DIAGNOSIS under "Automatic air conditioning".
10 Select "Read coding and change if necessary".

11 Adjust "National version" according to
customer's request
Settings for blower and temperature: ?
"Rest of the world". = Minimum
"USA" = Standard
"----" = Maximum

12 Adjust "LED dimming" according to "SERIES"
13 Adjust further coding according to vehicle
specifications.
NumberDesignation
WH58.30-Z-1048-13ASTAR DIAGNOSIS diagnosis system, Compact Passenger Car6511 1801 00
Part no.DesignationQuantity
163 820 49 89Switch unit/automatic air conditioning control unit, ECE1
163 820 50 89Switch unit/automatic air conditioning control unit, USA1
K 1.8 [] 11Heater, diagnosis, basic knowledge AD83.20-P-2000GH
K 1.8 [] 12Heater, diagnosis, function check AD83.20-P-3000GH
NumberDesignation

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 159 © 2006 Mitchell Repair Information Company, LLC.