MERCEDES-BENZ ML350 1997 Complete Repair Manual

Fig. 174: Identifying Air Conditioning Control Module Components
REMOVE AND INSTALL EVAPORATOR TEMPERATURE SENSOR - AR83.30-P-8085GH
MODEL 163 with CODE (580) Air conditioning or Tempmatic for USA
Fig. 175: Identifying Evaporator Temperature Sensor Components


Removal, installation
1Disconnect ground cable of battery AR54.10-P-0003A
2Remove switch unit for heater/ ventilation (1) AR83.20-P-
1835GH
3Unscrew bolt (4) for air conditioning control module (N19) at
evaporator housing (3)
4Disconnect connector (5) at air conditioning control module (N19)
5Detach air conditioning control module (N19) from evaporator
housing (3)
6Install in the reverse order
7Encode radio AR82.60-P-7502-
01GH
8Read out diagnostic trouble code memory, erase and set clock


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 217 © 2006 Mitchell Repair Information Company, LLC.

REMOVE/INSTALL OUTSIDE AIR TEMPERATURE SENSOR - AR83.30-P-8086GH
MODELS 163.113 #A up to 289564, 163.154 #A as of 145272 up to 289564, 163.172 #A as of 145272,
163.174 #A up to 289564, 163.113 #X up to 754619, 163.136 #X as of 708319, 163.154 #X as of 708319 up
to 754619, 163.172 #X as of 708319 with CODE (580) Air conditioning or Tempmatic for USA
Remove/Install

Risk of explosion from welding or
soldering work on closed air
conditioning system. Risk of
poisoning. Inhaling overheated
refrigerant vapors may be toxic. Risk
of injury. Contact with liquid
refrigerant may result in injury to the
skin and eyes.Do not carry out any welding work on the
closed air conditioning system or in the
surrounding area. No smoking or open
flames. Wear eye protection and protective
gloves. Work only in well ventilated areas.
Carry out repair work on the air
conditioning system circuit only after the
system has been discharged.
AS83.00-
Z-0001-
01A
Procedures if air conditioning system is
damaged or leakingAll models
AH83.30-
N-0004-
01A

Protect air conditioning circuit and
components from moisture when
carrying out repair work
All models fitted with air conditioning
AH83.30-
N-0005-
01A
Notes on handling refrigerant R134aAll models fitted with air conditioning
AH83.30-
N-0003-
01A
1Remove evaporator housing AR83.30-
P-5200GH
2Disassemble AC housing AR83.30-
P-5201GH
3Unclip evaporator temperature sensor
(B10/6) from evaporator (1)
4Install in the reverse order

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 218 © 2006 Mitchell Repair Information Company, LLC.

Fig. 176: Identifying Coolan t Compensating Reservoir
Fig. 177: Identifying Outside Air Te mperature Sensor And Connector


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 219 © 2006 Mitchell Repair Information Company, LLC.

Remove/install

Risk of injury to skin and eyes
suffering scalding from contact with
hot coolant spray. Risk of poisoning
from swallowing coolant.
Do not open cooling system unless coolant
temperature is below 90°C. Open cap slowly
and release the pressure. Do not pour
coolant into beverage bottles.
Wear protective gloves, protective clothing
and eye protection.
AS20.00-Z-
0001-01A

Risk of explosion from welding or
soldering work on closed air
conditioning system. Risk of
poisoning. Inhaling overheated
refrigerant vapors may be toxic. Risk
of injury from skin and eye contact
with liquid refrigerant.Do not carry out any welding work on the
closed air conditioning system or in the
surrounding area. No smoking or open
flames. Wear eye protection and protective
gloves. Work only in well ventilated areas.
Carry out repair work on the air
conditioning system circuit only after the
system has been discharged.
AS83.00-Z-
0001-01A
Procedures if air conditioning system
is damaged or leakingAll models
AH83.30-
N-0004-
01A

Protect air conditioning circuit and
components from moisture when
carrying out repair work
All models fitted with air conditioning
AH83.30-
N-0005-
01A
Notes on handling refrigerant R134aAll models fitted with air conditioning
AH83.30-
N-0003-
01A
1Drain coolant J Engine 112, 113.AR20.00-P-
1142HA
Engine 111.AR20.00-P-
1142HG
Engine 612.963.AR20.00-P-
1142M
2Unscrew coolant compensating
reservoir (1) on firewall Lay compensating reservoir to one side.
3Disconnect coolant delivery/return
hoses for heat exchanger (2) Remove hose clamps from coolant hoses.
4Discharge air conditioning system
Installation: Evacuate air conditioning,
refill and check for proper operation and
leaktightness.AR83.30-P-
1760GH
5Remove cover on expansion valve
(4)
6Remove nut (3) on expansion valve
(4) Replace self-locking nut.
*BA83.30-
P-1003-01B
7Disconnect refrigerant lines from
expansion valve Installation: Install new sealing rings
and moisten with compressor oil.

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 220 © 2006 Mitchell Repair Information Company, LLC.

Dashboard
Air conditioning system
8Remove wiper system AR82.30-P-
6400GH
9Remove nuts (5) from instrument
panel at firewall
*BA68.10-
P-1001-
01A
10Remove paneling from A-pillar AR68.30-P-
4050GH
11Remove plastic nuts on driver's side
at paneling below instrument panel
12Remove paneling on right in footwell AR68.30-P-
4010GH
13
Remove rubber covers on side at the
A-pillars and unscrew screws for
instrument panel at A-pillar (arrows)

*BA68.10-
P-1002-
01A
14Remove center console AR68.20-P-
2000GH
15Unscrew bolt (6) underneath the
instrument panel
*BA68.10-
P-1003-
01A
16Withdraw instrument panel to the
rear Bring in helper. Cushion front edge of
selector lever module so that lower edge of
instrument panel is not damaged.

17Turn instrument panel around so that
the back is accessible Do not overstretch interior wiring
harness.
18Detach outside temperature sensor
connector (B10/5x1)
19Disconnect cable from temperature
sensor to evaporator housing Installation: Ensure clean cable routing.
20Remove outside temperature sensor
(B10/5) from air duct 2 bolts.
21Install in the reverse order
22Inspect cooling system for leaks AR20.00-P-
1010HA
NumberDesignationModel Series 163
BA68.10-P-1001-01ANut, dashboard to firewallNM8
BA68.10-P-1002-01ABolt, dashboard to A-pillarNM19
BA68.10-P-1003-01ABolt, dashboard to transmission tunnelNM30
NumberDesignationModel Series 163
BA83.30-P-1003-01BNut to pipeline on expansion valveNM10

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 221 © 2006 Mitchell Repair Information Company, LLC.

REMOVE/INSTALL AIR OUTLET TEMPERATURE SENSOR - AR83.30-P-8087GH
MODEL 163.113 #A as of 289565, 163.154 #A as of 289620, 163.174 #A as of 289565, 163.113 #X as of
754620, 163.128/157/175
Instrument panel center nozzles
Fig. 178: Identifying Center Nozzle Air Stream Temperature Sensor

REMOVE/INSTALL AIR OUTLET TEMPERATURE SENSOR - AR83.30-P-8087GI
1.1Remove glove compartment Only required on left hand drive vehicles.AR68.10-P-
1400GI
1.2Remove instrument cluster Only required for right-hand steering.AR54.30-P-
6015GH
2Remove center air nozzles AR68.10-P-
1150GH
3
Remove center nozzle air
stream temperature sensor
(B10/24)
Do not damage center nozzle air stream temperature
sensor (B10/24) in order to avoid malfunctions.
The center nozzle air stream temperature sensor
(B10/24) is positioned on the right side above the air
nozzles on the instrument panel.
Turn the center nozzle air stream temperature
sensors (B10/24) 90° counterclockwise.

4
Disconnect center nozzle air
stream temperature sensor plug
(B10/24)

5Install in the reverse order

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 222 © 2006 Mitchell Repair Information Company, LLC.

MODEL 163.113 /154 /174 #A as of 289565, 163.113 #X as of 754620, 163.128/157/175
Driver's side footwell
Fig. 179: Identifying Front Footwell Air Stream Temperature Sensor

REMOVE/INSTALL AIR OUTLET TEMPERATURE SENSOR - AR83.30-P-8087GJ
MODEL 163.113 /154 /174 #A as of 289565, 163.113 #X as of 754620, 163.128/157/175
Blower motor in rear

Remove/install
1Remove cover below instrument
panel AR68.10-P-
1500GH
2
Disconnect plug from front footwell
air stream temperature sensor
(B10/25)

3Remove front footwell air stream
temperature sensor(B10/25)
Do not damage front footwell air
stream temperature sensor (B10/25).
Turn front footwell air stream
temperature sensor (B10/25) 90
counterclockwise.

4Install in the reverse order

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 223 © 2006 Mitchell Repair Information Company, LLC.

Fig. 180: Identifying Rear Air Stream Temperature Sensor And Connector
REMOVE, INSTALL IN-CAR TEMPERATURE SENSOR FOR ASPIRATOR BLOWER (M9) - AR83.30-P-8100GH
MODELS 163.113/136/154/172/174 as of 1.9.99 up to 31.8.01

Remove/install
1Remove center console AR68.20-P-
2000GH
2Remove sound deadener
3
Disconnect plug (1) from rear
air stream temperature sensor
(B10/7) The rear air stream temperature sensor
(B10/7) is positioned in the left air nozzle on
the blower motor.

4Remove rear air stream
temperature sensor (B10/7)
Do not damage rear air stream temperature
sensor (B10/7).
Turn rear air stream temperature sensor
(B10/7) 90 counterclockwise.

5Install in the reverse order

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 224 © 2006 Mitchell Repair Information Company, LLC.

Fig. 181: Identifying Components Of In-Car Temperature Sensor For Aspirator Blower
REMOVE/INSTALL SWITCH UNIT/AUTOMATIC AIR CONDITIONING CONTROL MODULE - AR83.40-P-6500GH

Removal, installation
1Remove ETC control module AR27.19-P-
1719GH
2Detach connector for interior/rear lamp
wiring harness (X18) at ETC bracket (1) Release clamp on back of
bracket and slide connector
forward.

3Disconnect connector (X18)
4Unscrew bolts (2)
5Lay bracket (1) downward and to the side
6Detach hose (3) at aspirator blower (M9)
7Detach clip (5) of aspirator blower
connector at instrument panel bracket
8Disconnect in-car temperature sensor
aspirator blower's connector
9Unscrew bolts (4)
10Remove in-car temperature sensor
aspirator blower (M9)
11Install in the reverse order

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 225 © 2006 Mitchell Repair Information Company, LLC.

MODEL 163.113 /154 /174 #A as of 289565, 163.113 #X as of 754620, 163.128/157/175
Fig. 182: Identifying AAC Push
-button Control Module
REMOVE AND INSTALL SUN SENSOR - AR83.40-P-6720GH
MODEL 163.113 /154 /174 #A as of 289565, 163.113 #X as of 754620, 163.128 /157 /175 with CODE (580)
Air conditioning or Tempmatic for USA

Remove/install
1Remove center section of instrument panel AR68.10-P-
1030GH
2
Remove switch unit of AAC control and operating
module (N22) from center part of instrument panel
(1)

3Unscrew screws (2) from AAC control and
operating module (N22)
4Disconnect AAC control and operating module
(N22) from center section of instrument panel Loosen retaining
clamps at the top and
bottom.

5Install in the reverse order

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:19 PMPage 226 © 2006 Mitchell Repair Information Company, LLC.