1997 MERCEDES-BENZ ML320 drain the coolant

235 Engine compartment
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index Adding coolant
If coolant has to be added, a 50 / 50 mixture of water and
MB anticorrosion / antifreeze should be added.
After adding coolant, close cap until you hear it click a
few times.
The drain plugs for the cooling system are located on
the left and right side of the engine block directly above
the engine mounts and at the bottom of the radiator.
Anticorrosion / antifreeze mixture, see page 297.
Wa r n i n g !
In order to avoid possible serious burns or injury:
• Use extreme caution when opening the hood if
there are any signs of steam or coolant leaking
from the cooling system, or if the coolant
temperature gauge indicates that the coolant is
overheated.
• Do not remove pressure cap on coolant
reservoir if engine temperature is above 194°F
(90°C). Allow engine to cool down before
removing cap. The coolant reservoir contains
hot fluid and is under pressure.• Using a rag, slowly open cap approximately
1/2 turn to relieve excess pressure. If opened
immediately, scalding hot fluid and steam will
be blown out under pressure.• Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which may
burn if it comes into contact with hot engine
parts.

235
Engine compartment
Te ch n ica l
data
Instruments
and controls Operation Driving
Instrument
cluster display Practical hints
Car care Index
Adding coolant
If coolant has to be added, a 50 / 50 mixture of water and
MB anticorrosion / antifreeze should be added.
After adding coolant, close cap until you hear it click a
few times.
The drain plugs for the cooling system are located on
the left and right side of the engine block directly above
the engine mounts and at the bottom of the radiator.
Anticorrosion / antifreeze mixture, see page 297.
Wa r n i n g !
In order to avoid possible serious burns or injury: • Use extreme caution when opening the hood if there are any signs of steam or coolant leaking
from the cooling system, or if the coolant
temperature gauge indicates that the coolant is
overheated.
• Do not remove pressure cap on coolant reservoir if engine temperature is above 194 °F
(90 °C). Allow engine to cool down before
removing cap. The coolant reservoir contains
hot fluid and is under pressure.• Using a rag, slowly open cap approximately 1/2 turn to relieve excess pressure. If opened
immediately, scalding hot fluid and steam will
be blown out under pressure.• Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may
burn if it comes into contact with hot engine
parts.

222 OperationEngine compartment
Screw filler cap2 back on filler neck.
More information on engine oil can be
found in the “Technical data” section
(
page 300) and (
page 301).
Transmission fluid level
The transmission fluid level does not need
to be checked. If you notice transmission
fluid loss or gear shifting malfunctions,
have an authorized Mercedes-Benz Light
Truck Center check the automatic trans-
mission.Coolant
The engine coolant is a mixture of water
and anticorrosion / antifreeze. To check
the coolant level, the vehicle must be
parked on level ground and the engine
must be cool.
!Excess oil must be siphoned or drained
off. It could cause damage to the
engine and catalytic converter not
covered by the Mercedes-Benz Limited
Warranty.
Warning!
G
In order to avoid any possibly serious burns:

Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system,
or if the coolant temperature gauge indi-
cates that the coolant is overheated.


Do not remove pressure cap on coolant
reservoir if engine temperature is above
194°F (90°C). Allow engine to cool
down before removing cap. The coolant
reservoir contains hot fluid and is under
pressure.


Using a rag, slowly open the cap approx-
imately ½ turn to relieve excess pres-
sure. If opened immediately, scalding
hot fluid and steam will be blown out un-
der pressure.


Do not spill antifreeze on hot engine
parts. Antifreeze contains ethylene gly-
col which may burn if it comes into con-
tact with hot engine parts.


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)

Copyright DaimlerChrysler AG 12.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1

AR20.00-P-1142HA
Draining and pouring in coolant
2.4.93

ENGINE
112 in MODELS 129, 163, 202, 208, 210, 211.061 /065 /261 /265 /080 /280 /082 /282, 220, 230.467

ENGINE
113 in MODELS 129, 163, 202, 208, 210, 211.070 /083 /283, 215, 220

ENGINE
113.962 in MODELS 463.206 /240 /241 /247 /248 /249 /254

ENGINE
112.945 in MODELS 463.209 /232 /233 /244 /245 /250

ENGINE
137 in MODELS 215, 220

ENGINE
113.982 in MODELS 463.241 /243 /246

P20.00-0215-06

Illustrated on model 202

1
Coolant expansion reservoir

2
Cooling system cap

3
Radiator drain plug

3a
Drain hose (inner diameter 12 mm)

4
Crankcase drain plug

4a
Drain hose (inner diameter 14 mm)

P20.00-2045-06

Shown on model 215 with M137

1
coolant expansion reservoir

2
Cooling system cap

3
Radiator drain plug

3a
Drain hose (inner diameter 12 mm)

Draining


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


Notes on coolant
All engines

AH20.00-N-2080-01A

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d by Modification services.
Page 1

1
Open cooling system cap (2) on coolant

expansion reservoir (1)

Cap with detent:

Turn cap carefully as far as the first detent,

release pressure, and then unscrew cap.

2-stage and 1-stage cap: Rotate cap half

a revolution in a counterclockwise direction,

release overpressure, then unscrew cap.

2.1Remove engine compartment paneling
Models 129, 202, 208, 210

AR61.20-P-1105AB

Models 163.172/ 174/ 175

AR61.20-P-1105GH

Models 163.113/ 128

AR94.30-P-5400GH

Model 211

AR61.20-P-1105T

Models 215, 220

AR61.20-P-1105M

Model 230

AR61.20-P-1105R

2.2Remove underride guard
Only on model 463

3.1
Remove air guide
Only on model 163 with engine 113.942

4
Drain coolant

Model 163: For draining coolant, detach

bottom coolant line at radiator or at coolant

pump.

Collect coolant Observe regulations for

disposal of coolant.


Installation:
On model 163 replace
radiator connection of hose clamps to coolant

hose, otherwise this can cause a damage to

the bolt/thread.


Hose clamp

*BA20.20-P-1004-01A

Pouring in

5
Pour in coolant

All except engine 137

*BF20.00-P-1001-02K


Engine 137

*BF20.00-P-1001-02M


Notes on coolant level
Engines 112, 113, 137, 275, 285

AH20.00-P-1142-01V


Notes on coolant level
Model 163 with engines 111, 112, 113

AH20.00-P-1142-01GH

6
Bleed cooling system

Let engine run, put heater on full heat

output.

Except stationary heater, code 228

AR20.00-P-1142-06GA

With stationary heater code 228

7
Inspect cooling system for leaks

AR20.00-P-1010HA


Radiator, coolant hoses

Number

Designation
Engines

112.942/

970,

113.942/

965/981

BA20.20-P-1004-01A
Hose clamp
Nm
3

Designation
Engines

112.910 /920

in model 202,

112.940

in model 208
Engines

112.911/921/941

in model 210
Engines

112.922/944/972

in model 220

BF20.00-P-1001-02K
Cooling system
Total capacity
Liters
Y
9.5
Y
10.0
Y
10.5

Capacity of

anticorrosion/antifreeze agent

down to -37°C

Liters

Y
4.75
Y
5.0
Y
5.0

Capacity of anticorrosion/

antifreeze agent down

to -45°C

Liters

Y
5.25
Y
5.5
Y
5.5

Specifications for Operating

Fluids
SheetBB00.40-P-0310-01ABB00.40-P-0310-01ABB00.40-P-0310-01A
SheetBB00.40-P-0325-00ABB00.40-P-0325-00ABB00.40-P-0325-00A

Copyright DaimlerChrysler AG 12.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 2

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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d by Modification services.
Page 1

P01.30-0299-06

20
Bolts cylinder head
!
timing case cover

21
Cylinder head bolts

22
Cylinder head left

23
Cylinder head right

24
Left cylinder head gasket

25
Right cylinder head gasket

26
Dowel sleeves


Remove/Install

Notes on self-locking nuts and bolts
All models

AH00.00-N-0001-01A


External torx set

*001589760900

Torx bit set

*000589011000


Danger!

Risk of explosion
caused by oxyhydrogen

gas.
Risk of poisoning and caustic burns


caused by swallowing battery acid.
Risk of

injury caused by burns to skin and eyes from

battery acid or when handling damaged lead-

acid batteries
No fire, sparks, open flames or smoking.

Wear acid-resistant gloves, clothing and

safety glasses. Pour battery acid only into

suitable and appropriately marked containers.

AS54.10-Z-0001-01A

1
Disconnect battery ground cable


Installation:
After connecting, read out

fault memory, encode radio and normalize

power windows.

Vehicles with stationary heater: Set time on

timer for stationary heater
AR54.10-P-0003A

Notes on battery
All models

AH54.10-P-0001-01A

Danger!

Risk of death

caused by vehicle slipping or

toppling off of the lifting platform.
Align vehicle between the columns of the

hydraulic hoist and position the four support

plates below the hoist support points specified

by the vehicle manufacturer.

AS00.00-Z-0010-01A

2
Place the vehicle on lifting platform

AR00.60-P-1000GH
3.1
Remove air guide (1)


Only with engine 113.942

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

4
Drain coolant

Remove coolant hose at bottom on

radiator.

AR20.00-P-1142HA

5
Remove engine cover

6.1
Remove viscous fan (2)

All except model 163.174 /175 with

engine 113.981 /965.

Right-hand thread!

AR20.40-P-5660C

7.1
Remove the fan shroud (3).

Only model 163.154 /157 /172. Unscrew

bolts (4) from bottom of fan shroud

7.2
Remove electric fan

Only model 163.174/ 175.

AR20.40-P-5000GH

Copyright DaimlerChrysler AG 20.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 2