Mercedes-Benz ML320. Manual — part 708

Fig. 176: Identifying Coolant Compensating Reservoir

Fig. 177: Identifying Outside Air Temperature Sensor And Connector

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

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 leaking

All 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 R134a All models fitted with air conditioning

AH83.30-
N-0003-
01A

1

Drain coolant

J Engine 112, 113.

AR20.00-P-
1142HA

Engine 111.

AR20.00-P-
1142HG

Engine 612.963.

AR20.00-P-
1142M

2

Unscrew coolant compensating
reservoir (1) on firewall

Lay compensating reservoir to one side.

3

Disconnect coolant delivery/return
hoses for heat exchanger (2)

Remove hose clamps from coolant hoses.

4

Discharge air conditioning system

Installation: Evacuate air conditioning,

refill and check for proper operation and
leaktightness.

AR83.30-P-
1760GH

5

Remove cover on expansion valve
(4)

6

Remove nut (3) on expansion valve
(4)

Replace self-locking nut.

*BA83.30-
P-1003-01B

7

Disconnect 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

Dashboard

Air conditioning system

8

Remove wiper system

AR82.30-P-
6400GH

9

Remove nuts (5) from instrument
panel at firewall

*BA68.10-
P-1001-
01A

10

Remove paneling from A-pillar

AR68.30-P-
4050GH

11

Remove plastic nuts on driver's side
at paneling below instrument panel

12

Remove 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

14

Remove center console

AR68.20-P-
2000GH

15

Unscrew bolt (6) underneath the
instrument panel

*BA68.10-
P-1003-
01A

16

Withdraw 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.

17

Turn instrument panel around so that
the back is accessible

Do not overstretch interior wiring

harness.

18

Detach outside temperature sensor
connector (B10/5x1)

19

Disconnect cable from temperature
sensor to evaporator housing

Installation: Ensure clean cable routing.

20

Remove outside temperature sensor
(B10/5) from air duct

2 bolts.

21

Install in the reverse order

22

Inspect cooling system for leaks

AR20.00-P-
1010HA

Number

Designation

Model Series 163

BA68.10-P-1001-01A

Nut, dashboard to firewall

NM 8

BA68.10-P-1002-01A

Bolt, dashboard to A-pillar

NM 19

BA68.10-P-1003-01A

Bolt, dashboard to transmission tunnel

NM 30

Number

Designation

Model Series 163

BA83.30-P-1003-01B

Nut to pipeline on expansion valve

NM 10

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

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

1.1 Remove glove compartment

Only required on left hand drive vehicles.

AR68.10-P-
1400GI

1.2 Remove instrument cluster

Only required for right-hand steering.

AR54.30-P-
6015GH

2

Remove 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)

5

Install in the reverse order

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me