cooling MERCEDES-BENZ ML320 1997 Complete Owner's Manual

304 Technical dataFuels, coolants, lubricants etc.Damage or malfunctions resulting from
poor fuel quality or from blending specific
fuel additives are not covered by the
Mercedes-Benz Limited Warranty.Coolants
The engine coolant is a mixture of water
and anticorrosion / antifreeze, which pro-
vides:

Corrosion protection


Freeze protection


Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory
with a coolant providing freeze protection
to approximately -35°F (-37°C) and corro-
sion protection.
If the antifreeze mixture is effective to
-22°F (-30°C), the boiling point of the cool-
ant in the pressurized cooling system is
reached at approximately 266°F (130°C).The coolant solution must be used year
round to provide the necessary corrosion
protection and increase in boil-over pro-
tection. Refer to Service Booklet for
replacement interval.
To provide important corrosion protection,
the solution must be at least 45%
anticorrosion / antifreeze (equivalent to
freeze protection to approx. - 22°F
[-30°C]). If you use a solution that is more
than 55% anticorrosion / antifreeze (freeze
protection to approx. - 49°F [-45°C]), the
engine temperature will increase due to
the lower heat transfer capability of the so-
lution. Therefore, do not use more than
this amount of anticorrosion / antifreeze.If the coolant level is low, water and MB
anticorrosion / antifreeze should be used
to bring it up to the proper level (have cool-
ing system checked for signs of leakage).
Please make sure the mixture is in accor-
dance with label instructions.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water. If you
are not sure about the water quality, con-
sult your authorized Mercedes-Benz Light
Truck Center.

317 Index
A
ABS 25, 76, 311
ABS control 76
LOW RANGE mode 77
Malfunction indicator lamp 242
Warning lamp 242
Accelerator position, automatic
transmission 123
Accident
In case of 52
Activating
Air circulation mode 139
Air recirculation mode 139
Anti-theft alarm system 83
Automatic climate control 135
ESP 82
Exterior headlamps 48
Hazard warning flasher 112
Headlamps 48
High beams 110
Ignition 33Immobilizer 54, 83
Rear passenger compartment ventila-
tion and climate control 141
Rear window defroster 133
Rear window wiper 51
Residual heat 140
Seat heater* 98
Tow-away alarm 85
Warning indicators (Parktronic*) 155
Windshield wipers 50
Activating automatic central locking 93
Adding
Coolant 223
Engine oil 221
Additional turn signals 266
Adjustable steering column
Indicator lamp 253
Adjusting 34
Backrest tilt 36, 38
Exterior rear view mirror 40
Head restraint height 36, 38Head restraint tilt 37, 39
Headlamp aim 272
Instrument cluster illumination 116
Manual seat 35
Mirrors 40
Power seats* 37
Seat cushion tilt 38
Seat fore and aft 35
Seat fore and aft adjustment 37
Seat height 36, 38
Seats 34
Steering wheel 39
Adjusting air distribution
Automatic climate control 137
Adjusting air volume
Automatic climate control 137
Air conditioner (cooling)
Turning on 139
Air conditioning
Cooling 139

322 IndexCoolant 222, 304
Adding 223
Anticorrosion/antifreeze
quantity 304
Checking level 222
Indicator lamp 249
Temperature 213
Temperature gauge 117
Coolant level
Checking 215, 222
Crossing obstacles 204
Cruise control 150, 311
Canceling 151
Driving downhill 151
Driving uphill 151
Fine adjustment 152
LOW RANGE mode 152
Saving current speed 151
Setting speeds 152
Cruise control lever 150Cup holder 166
Cleaning 238
In front seat armrest 167
In instrument panel 166
In rear centerconsole 167
Customer Assistance Center (CAC) 311
D
Daytime running lamp mode 109
Deactivating
Air conditioning (cooling) 139
Air recirculation mode 139
Alarm 84
Anti-theft alarm system 84
Automatic climate control 135, 137
Cruise control 151
Defrost 138
Engine 54
ESP 81
Front fog lamps, rear fog lamp 111
Hazard warning flasher 112
Headlamps 54
Immobilizer 83
Rear passenger compartment ventila-
tion and climate control 141
Rear window defroster 133Residual heat 140
Seat heater* 98
Tow-away alarm 85
Tow-away alarm (vehicles with trip
computer*) 85
Tow-away alarm (vehicles without trip
computer*) 86
Deactivating automatic central
locking 93
Deep water see Standing water 200
Defogging
Windshield 138
Defrosting 138
Difficulties
While driving see Problems while
driving 51
With starting 47
Direction of rotation (tires) 227
Discharged battery
Jump starting 281
Disconnecting
Vehicle battery 279
Display in the speedometer 117

lockup clutch (p-KUB) depending on the control pressure in converter lockup clutch (p-S/KUB). See Fig. 80.
Depending on the working pressure in the converter lockup clutch (p-KUB) the converter lockup clutch (KUB)
is:
Engaged
Disengaged
N slip mode
In the lower position of the converter lockup clutch regulating valve (27) lubricating oil (p-Sm) flows through
the torque converter and oil cooler (65) into the transmission (converter lockup clutch depressurized). In its
regulating position (slipping, torque converter lockup clutch pressurized), a reduced volume of lubricating oil
(p-Sm) flows through the annular passage (27a) bypassing the torque converter and passing direct through the
oil cooler (65) into the transmission. The other part of the lubricating oil (p-Sm) is led via the restrictor (a) into
the torque converter for cooling the converter lockup clutch (KUB).
R/P Lock, Location/Task/Design/Function

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1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Holding Pressure Shift Valve, Location/Task/Design/Function

See HOLDING PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Shift Pressure Shift Valve, Location/Task/Function

See SHIFT PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Overlap Regulating Valve, Location/Task/Function

See OVERLAP REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Location/Task/Function Of Command Valve

See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Lubricating Pressure, Function
Operation
The working pressure regulating valve diverts surplus oil to the lubrication pressure regulating valve, from
where it is controlled and used for lubricating and cooling the mechanical transmission and torque converter. In
addition the pressure in the torque converter is limited via the lubrication pressure.
Working Pressure Regulating Valve, Location/Task/Function

See WORKING PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Lubrication Pressure Regulating Valve, Location/Task/Function

See LUBRICATION PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Torque Converter Lockup Clutch Regulating Valve, Location/Task/Function

See SHIFT PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Upshift/Downshift Solenoid Valve, Location/Task/Design/Function

See UPSHIFT/DOWNSHIFT SOLENOID VALVE, LOCATION/TASK/DESIGN/FUNCTION
.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Fig. 188: Identifying Air Conditioning System Hose And Clip
Remove/Install
1Remove upper frame cross
member AR62.30-P-2300GH
2Drain the washer fluid
reservoir Manual pumpFig. 189
3Disconnect connectors
and hoses from pumps (5)Loosen wiring harness
from the side of the
washer fluid reservoir. If
fitted, disconnect plug
from washer fluid level
indicator switch.
4Unscrew bolt (2)
5Loosen air conditioning
hose (3) from clip (4)
6.1Remove covers and
locking clips from fuse
and relay module Only Model 163.128.
7Detach cooling module
(10) from lower grommets
8Remove washer fluid
reservoir (1) Loosen washer fluid
reservoir (1)from lower
grommets (6). Lift up

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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Fig. 189: Identifying Hand Pump (210 589 00 71 00)
CODING RADIO - AR82.60-P-7502-01A
1. If the radio is disconnected from the power supply, it is not operational when re-connected. After
switching on the ignition and the radio, the readout CODE appears in the display.
2. The code number for the radio is advised to you on the enclosed CODE CARD.
3. To enter the first digit of the code number, you have to continue pressing station button 1 until the correct
digit appears in the display. Adopt the same procedure for the second, third and fourth digits.
4. Once you have entered the correct code number with the station buttons 1, 2, 3, 4 and confirmed the entry
with the SEEK button (press down), the readout CODE disappears. The radio can now be operated.
5. If you enter a wrong code three times, you must wait 15 minutes before making a new entry. In addition,
if 9 incorrect entries are made, the radio will then not operate for 24 hours. During this time the radio and
the ignition (terminal 15) must remain switched on.
CODING RADIO - AR82.60-P-7502-01B
1. If the radio is disconnected from the power supply, it cannot be operated by simply reconnecting. After
switching on the ignition and the radio the word "CODE" appears in the display on the radio.
2. The code number for the radio is given on the enclosed CODE CARD.
3. Enter the code number with the station button, e.g. number 1, station button 1.
After entering the first number the word "CODE" disappears and the number entered appears followed
by 4 dashes. The next character to be entered flashes. After entering all five numbers, the first character
cooling module with the
help of an assistant. Press
washer fluid reservoir
inwards and pull straight
upwards.
Installation: Ensure that
the washer fluid reservoir
(1) is correctly seated in
the grommets (6) and
side clip.
9Install in the reverse order

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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LARGER
CONTAINER FOR
WINDSHIELD
WASHER SYSTEM
Remove
1Remove radiator
crossmember AR62.30-P-2300GH
2Drain the washer fluid
reservoir Fig. 189
3Remove container (1) Detach hoses and
connectors. Remove
screws (2) and disconnect
from lower grommets.
4Loosen air conditioning
hose (3) from clip (4)
5Detach cooling module
(10) from lower
grommets
Convert
6Press out template (5) and
set to correct dimension
(a, b) Determine actual
dimension (a) from
drawing. Divide target
dimension (a) by
determined actual
dimension (a) and copy
template with
corresponding factor to
original size.
Check dimensions for
both axes.
7Cut out holes (6) of
template
8Using the holes (7),
position the template on
the left inner fender and
fasten in place with
adhesive tape
9Center punch body at
bore (8)
10Remove template (5).
11Ø=19 mm bore hole at
punch mark *WH58.30-Z-1003-34A
12Deburr hole

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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Fig. 412: Identifying Hand pump (210 589 00 71 00)
Commercially available tools
Parts ordering notes
13Clean, prime and paint
hole
Install
14Mount clip (9) into hole
15Installing larger washer
fluid reservoir Have someone assist
you in lifting the cooling
module. Make sure that
the container is
positioned correctly in
the grommets and that the
clip is properly seated.
Fasten inner side of
container using screws
(2). Tighten hoses and
connectors again. Level
sensor is not required .
16Mount cooling module
(10) in grommets again
17Fasten AC system hose
(3) onto clip (4) again
18Install radiator
crossmember again AR62.30-P-2300GH
19Fill washer fluid reservoir
NumberDesignation
WH58.30-Z-1003-34AStep drill bit dia. 16-30.5 mm
Part no.DesignationQuantity
000 986 06 50Priming pin1
163 860 11 60Washer fluid reservoir, 2 pumps
with level sensor1

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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Saturday, October 02, 2010 3:30:14 PMPage 467 © 2006 Mitchell Repair Information Company, LLC.

AR20.00-P-1142M
Drain, pour in coolant
8.11.99

ENGINE
612.963 in MODEL 163.113

P20.20-2083-12

1
Front noise encapsulation bottom part

2
Radiator

3
Radiator drain tap

4
Siphon hose

Draining


Danger!

Risk of injury
to
fingers being jammed or

pinched
when removing, installing or aligning

hoods, doors, trunk lid/tailgate or sliding roof.
When moving components, ensure that no

body parts or limbs are within the operating

range of moving parts.

AS00.00-Z-0011-01A


Danger!
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

1
Open engine hood and raise to vertical position


Have assistant secure hood.

AR88.40-P-1000GI

2
Open cap of coolant expansion reservoir

Turn cap half a turn in the anti-clockwise

direction, release pressure, and then unscrew

cap.

3
Remove front noise encapsulation bottom

part (1)

4
Attach siphon hose (4) to drain connection of

radiator

5
Drain coolant at radiator (2) on right

To do this, turn drain tap (3) at radiator (2)

into position "1" (arrow).


Disposal of coolants.

Pay attention to legal provisions or local

wastewater regulations!

Refer to Environmental Protection Catalog

issued by MBVD/PWU for locations in

Germany.

6
Clean cooling and heating system

Clean cooling and heating system in case

of impurities. See

#

Remove oil from cooling and heating system.
AR20.00-P-1250B

Pour in


Notes on coolant
All engines

AH20.00-N-2080-01A

7
Turn drain tap (3) at radiator (2) into position

"0" (arrow)

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