1997 MERCEDES-BENZ ML320 air condition

9
Detach return line (30f) and high-pressure

expansion hose (30i)

Connection fittings or banjo bolts

depending on the version. Seal off line

connections with plugs.


Installation:
Replace sealing rings.


Connection fitting, return line

*BA46.20-P-1001-01D

Connection fitting, high-pressure

expansion hose

*BA46.20-P-1002-01D

Banjo bolt, return line

*BA46.20-P-1004-01D

Banjo bolt, high-pressure expansion hose

*BA46.20-P-1005-01D

Plug

*129589009100

10
Detach nut (25d) and bolt from steering

coupling (25) and pull lower steering shaft

(80a) upwards out of steering coupling (25)

Do not use force as the corrugated tube is

sensitive to lateral forces. Enlarge clamping

groove a little with a screwdriver if necessary.


Installation:
Replace nut (25d).


Installation:
Turn rack-and-pinion

steering to center position and fit steering

coupling.

AR46.20-P-0600-01GH


*BA46.10-P-1001-01D

11
Detach rack-and-pinion steering (23) from

front axle carrier (1) by unscrewing bolts (23a)

The installed position of the shims (23h,

23i) on the right-hand side, between the

rubber mount and the front axle carrier, must

be observed as the shims are of different

thicknesses.


Installation:
Attach rack-and-pinion

steering to front axle carrier.

AR46.20-P-0600-03GH


Assessing condition of steering gear when

repairing accident vehicles

AH46.20-P-9409-01A

12
Check rubber mount (21) of rack-and-pinion

steering mounting for damage
Replace rubber mount if necessary:
#

Removing rubber mounts on rack-and-pinion

steering mounting

AR46.20-P-0600-02GH

13
Install in the reverse order

14
Fill and bleed power steering pump
Engines 112, 113

AR46.30-P-0010B
Engines 111, 612, 628
AR46.30-P-0010P

15
Check steering for function and leaks

There is a grease cushion under the cover
cap. A small amount of escaping grease is to

be regarded as normal and must not be

confused with leakage.

16.1
Check toe on front axle and adjust if necessary
When installing a new rack-and-pinion

steering, see:

#

Performing chassis alignment check

AR40.20-P-0200A


Steering shaft

Number

Designation
Model 163

BA46.10-P-1001-01D
Self-locking nut, steering coupling to steering shaft

and rack-and-pinion steering
Nm
28


Steering gear

Number

Designation
Model 163

BA46.20-P-1001-01D
Screwed connection fitting from return line

to rack-and-pinion steering
Nm
15

BA46.20-P-1002-01D
Screwed connection fitting from high-

pressure expansion hose to rack-and-pinion

steering
Nm
15

BA46.20-P-1003-01D
Bolted connection, rack-and-pinion steering

to front axle carrierNm
50

BA46.20-P-1004-01D
Banjo bolt, return line to rack-and-pinion

steering
Nm
30

BA46.20-P-1005-01D
Banjo bolt, high-pressure expansion hose to

rack-and-pinion steering
Nm
30

Copyright DaimlerChrysler AG 06.07.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 2

AR20.20-P-3865HC
Remove/install the radiator
5.6.97

ENGINE
112.942 in MODEL 163.154

ENGINE
112.970 in MODEL 163.157

ENGINE
113.942 in MODEL 163.172

ENGINE
113.965 in MODEL 163.175

ENGINE
113.981 in MODEL 163.174

P20.20-2017-09

Shown on Model 163.154 with Engine 112

1
Viscous fan

2
Plate clamps of fan shroud

3
Fan shroud

4
Coolant line

5
Coolant line to expansion reservoir

6
Coolant line

7
Headlamps
17

Air deflector plate

18
Oil line (return line radiator

!
expansion

reservoir of power steering pump)

19
Oil line (feed line steering gear

!

radiator)

20
Fasteners

21
Damper rubber

8

Radiator crossmember

9
Rubber seal of radiator

10
ATF lines

11
Fan grille

12
Air guides

13
Clamps of air guides

14
Air conditioning system fluid reservoir

15
Radiator

16
Cover strips

Modification notes
23.3.00

Radiator with integral oil cooler for power steering pump
See step 5 and 16


Remove/install


External torx set

*001589760900


6 mm hexagon socket

*WH58.30-Z-1001-06A

7 mm hexagon socket

*WH58.30-Z-1002-06A

1.1
Remove air deflector plate (17)

Engine 113.942 only.

Danger!

Risk of injury
to skin and eyes from scalding

due to contact with hot coolant spray.
Risk of

poisoning
if coolant is swallowed.
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

2
Drain the coolant at the radiator


To drain the coolant, detach coolant line

at the bottom of the radiator or at the coolant

pump.


Installation:
Replace the hose clamps on

the radiator fitting for the coolant hose, as

they could cause damage to the screw/thread. AR20.00-P-1142HA

Hose clamp

*BA20.20-P-1004-01A

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

3.1
Remove viscous fan (1)

Engine 112.942 /970 and 113.942.

Right-hand thread!

AR20.40-P-5660C

3.2
Remove electric fan

Only Engine 113.965 /981.

AR20.40-P-5000GH
4.1
Pull off plate clamps of fan shroud (2)

Only for Engine 112.942, from 5/98.

5.1
Remove fan shroud (3)

Only for Engine 112.942 /970 und

113.942. Unscrew the bolts at bottom of fan

shroud for this step


Installation:
If installing a new radiator

with integral power steering pump oil cooler, a

new fan shroud is required if a radiator

without integral oil cooler was previously
installed.

6
Remove headlamp (7).

AR82.10-P-4730GH

7
Remove radiator crossmember (8)

AR62.30-P-2300GH

8
Detach coolant line (4, 6) and expansion

reservoir coolant line (5) at the radiator


Installation:
Replace the hose clamps on

the radiator fitting for the coolant hose, as

they could cause damage to the screw/thread.

Hose clamp

*BA20.20-P-1004-01A

9
Remove the rubber seal on radiator (9)

10.1
Remove oil line (return line of radiator
!

power steering pump expansion reservoir)

(18) and oil line (feed line of steering gear

!

radiator) (19)

From 5/98 only, seal off the connections.

Set of plugs

*129589009100

11
Unscrew ATF lines (10) at the radiator

Seal off the connections.


*BA20.20-P-1001-01A


*BA20.20-P-1003-01A

Set of plugs

*129589009100

12.1
Detach the connector from the fan and
remove the fan grille (11)

Only for Engine 112.942 /970 and 113.942.

13
Unscrew the condenser from the radiator
Do not disconnect the lines.

14
Remove fasteners (20) and damper rubber

(21)

The damper rubber (21) is designed to

prevent possible vibrations between the

condenser and radiator (15) during off-road

driving.

15
Remove air conditioning system fluid

reservoir (14) from the radiator

Place aside with the lines connected.

Detach the condenser from the radiator.

16
Remove radiator (15)

When installing, the spigots on the

radiator must be inserted in the rubber

grommets in the bottom crossmember.

Installation:
On Model 163.154 with

Engine 112.942 before VIN end number

043553, when installing a new radiator with

integral power steering pump oil cooler,

additional operations are required, if they

have not already been carried out:

#
v

Retrofit the bracket for the oil cooler line of

the power steering pump

SM46.30-P-0002A

k

Radiator with integral oil cooler for the power

steering pump

BT20.20-P-0001-01A

17
Detach air guides (12)

Replace the clamps on air guides (13).

18
Install in the reverse order

19
Pour in coolant

AR20.00-P-1142HA

20
Check the headlamp setting and correct if

necessary

e

Check and adjust the headlamp setting

AP82.10-P-8260GH

Danger!

Risk of accident
caused by vehicle starting

off when engine is running.
Risk of injury


caused by contusions and burns when

working in engine during starting procedure
Secure the vehicle to prevent it from moving.
Wear closed and snug-fitting work clothes.

Do not grasp hot or rotating parts.

AS00.00-Z-0005-01A

21
Check the oil level in the automatic

transmission and correct if necessary

AR27.00-P-0101A

22
Check the cooling system for leaks

AR20.00-P-1010HA


Radiator, coolant hoses

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

AR20.20-P-3865MM
Remove/install radiator
10.11.99

ENGINE
612.963 in MODEL 163.113

P20.20-2080-09

1
Electric fan

2
Low temperature cooler

3
Bolts (low temperature cooler)
110/2

Charge air cooler

4
Lamp units

5
Cover strips

6
Radiator crossmember

P20.20-2081-09

8
Coolant hose for coolant pump

9
Coolant hose of thermostat housing

10
Coolant hose of coolant expansion tank

11
Seal strip

12
Air ductings
19

Power steering oil line (feed line of
steering gear

!
radiator)

20
Attachment parts

21
Damper rubber

13

Mounting clips

14
Air conditioning fluid reservoir

15
Radiator

16
Bolts

17
Capacitor

18
Power steering oil line

(Return line of radiator

!

Power steering pump supply reservoir)


Removal/installation


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

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

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 second person secure hood.

AR88.40-P-1000GI

2
Connect no load current retention unit


*WH58.30-Z-1005-09A

3
Disconnect battery ground cable

AR54.10-P-0003A

4
Remove trim panel of cylinder head cover

AR01.20-P-5014-02B


*BA01.20-P-1002-01A


*BA01.20-P-1003-01A

5
Remove bottom part of noise encapsulation

at front

AR94.30-P-5400GH

6
Remove electric fan (1)

Remove toward bottom.

AR20.40-P-5000M

7
Drain coolant

At radiator.

AR20.00-P-1142M


Notes on coolant
All engines

AH20.00-N-2080-01A

8
Remove charge air cooler (110/2)

AR09.41-P-6817MM

9.1
Attach guard plate for radiator/condenser

With automatic air conditioning, code

581a and AC system or Tempmatic USA,

code 580.

Attach additional AC condenser in the

vehicle.

y

Guard plate for radiator/condenser
Engine 606 in model 124,
Engine 606.961 in model 140,

Engine 112, 113, 604, 605, 611.960 in

MODEL 202,

Engine 602.983, 612.966 in MODEL 461,

Engine 628.962, 612.965, 606.964, 112.945,

113.962/ 982 in MODEL 463,

Engine 111, 112, 611.962, 612.962 in model

203,

Engines 112, 113, 611.961, 612.961, 613.961

in MODEL 210,

Engine 112 in model 170,

Engine 112 in MODEL 220,

Engine 113 in MODEL 211, 215, 220,

Engine 112 in MODEL 208,

Engine 112, 612.963, 628.963 in MODEL 163,
Engine 112.923 /943, 113.961 in MODEL 129,

Engine 137, 275 in MODEL 215, 220,

Engine 613.960, 628.960 in MODEL 220,

Engine 113.992 in model 230.474,

Engine 271 in model 209, 203,

Engine 285.950 in model 240.078 /178,

Engine 612.967 in model 209.316,

Engine 648 in model 220

Engine 112.951 in model 639.601/603/

605/701/703/705/801/803/805

Engine 646.983/984 in model 639.601/

603/605/701/703/705/801/803/805

Engine 646.982 in model

639.601/603/605/701/703/705

WF58.50-P-0110-01A

10
Remove seal rail (11)

11
Extract steering oil from reservoir

Hand pump

*210589007100

12.1
Disconnect power steering oil line (return line

radiator

!
power steering pump supply

reservoir) (18)

Seal connections.


Installation:
Install new sealing rings.


*BA46.30-P-1012-01A


Clamp

*000589543700

Set of stop plugs

*129589009100

12.2
Disconnect power steering oil line (feed line of

steering gear

!
radiator) (19)


Clamp

*000589543700

Set of stop plugs

*129589009100

Hexagon socket wrench

*WH58.30-Z-1001-06A

Hexagon socket wrench

*WH58.30-Z-1002-06A

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

8.1
Check wheel sensor, valve body and sealing

rubber for damage
Vehicles with tire pressure monitor (code 475)

Do not remove wheel sensor for this.


Do not use compressed air, solvents or

detergents to clean the wheel sensor. Wipe

off dirt with a clean, lint-free cloth only.

Do not retighten the female torx bolt and

union nut.

Replace all valve components of wheel

electronics if:
D
The wheel sensor mounting bolt or union

nut is visibly loose.

Replace the wheel sensor if:

D
The wheel sensor is obviously damaged.

D
Tire sealant was used.

Install new wheel sensors:

#

Replace wheel sensor.

AR40.15-P-0080A

8.2
Install new valve (43g).
Vehicles without tire pressure monitor (code

475)

9
Checking condition of rim

AR40.10-P-1010-01A


Mounting

10
Moisten rim flange and tire beads with soapy

water and align assembly head at a small

distance (X, Y) to the disk wheel

Only use soapy water for fitting and

removing tires.

11
Place tire obliquely on the rim and pull on

over the rim flange using the tire installer


Position wheels with wheel sensors so

that the wheel sensor is approximately 180°

opposite the mounting head.

Do not apply compressive force to the wheel
sensor otherwise it will be damaged.


Observe the running direction on tires with

specified running direction.


Put as little stress as possible on bead

area.

12
Align the match points of the tire and disk

wheel with each other and remove the disk

wheel with tire from the tire mounting device

13
Inflate tires without valve element up to max.

3 bar

Do
not
unscrew valve element on disk

wheels with tire pressure monitor sensor.

The tire must slide evenly over the safety

shoulders of the disk wheel, otherwise coat

the tire beads with soapy water again.

14
Screw the valve element into the valve (43g)

and adjust the tire inflation pressure to the

specified value

Observe the tire pressure information in

the fuel filler flap of the vehicle.

15
Balance wheel

AR40.10-P-1040A

124 589 17 63 00 129 589 00 59 00

Removal tool

Assembly tool

Copyright DaimlerChrysler AG 06.07.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 2

different engine loads, e.g. power steering turned to full lock, engaging drive mode, switching on AC
compressor
different mixture, e.g. from activated charcoal canister if purging activated (depending on activated
charcoal charge)
Function
The actuator EFP/TPM/LLR (additional designation: throttle valve actuator) regulates the idling speed by
changing the throttle valve position. It is actuated by the ME-SFI control unit.
The ME-SFI control unit actuates the throttle valve motor (M16/1 m1) in line with the input signals received at
the ME-SFI control unit (N3/10).
Heating speed of the catalytic converter
In order to warm up the catalytic converter more rapidly to operating temperature, engine speed is increased in
the idle speed range to 1100 up to 1500 rpm for about 20 seconds after each starting procedure at coolant
temperatures of < 40 °C. When a Drive position is engaged, engine speed is immediately controlled to a lower
value.
Automatic transmission
When a drive position is engaged, a lower engine speed is controlled in order to reduce the creeping tendency o
f
the vehicle. The information "Drive position engaged/not engaged" is transmitted by the ETC control unit
(N15/3) over the CAN databus to the ME-SFI control unit.
Ignition angle
To assist the idle speed control, the ignition angle can be retarded by as much as 36° crank angle or advanced by
as much as 20° crank angle from the calculated specified value.

The control in the idle speed range by altering the ignition angle reacts more rapidly than altering the position o
f
the throttle valve.
The idling speed can be influenced with HHT or the STAR DIAGNOSIS.
AC compressor
In order to avoid engine speed dropping in the idle speed range when the AC compressor is engaged, the AC
push-button control unit (N19) or automatic air conditioning push-button control unit (N22) supplies a signal to
the ME-SFI control unit (as of approx. 6/96 over CAN) and the opening cross-section of the throttle valve is
enlarged.
When the air conditionin
g unit is switched on and the external temperature exceeds 35° C the idling speed on

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
me
Saturday, October 02, 2010 3:36:27 PMPage 17 © 2006 Mitchell Repair Information Company, LLC.

Fig. 13: Identifying Electronic Accelerator/Cruise Control/Idle Speed Control Actuator Components
Function
The actual value potentiometers for the throttle valve inform the ME control unit about the position of the
throttle valve (idling up to full load) in order to recognize the various loading conditions.
A.Ignition "Off"
In the de-energized state the throttle valve position is determined by the spring capsule (3).
B.Ignition "On"
When the ignition is switched on, the actuator motor in the EA/CC/ISC actuator is operated by the ME
control unit and the return spring is checked. The throttle valve adopts a position which then depends on
the coolant temperature.
C.Idle speed
The actuator motor controls the engine speed in the idle speed range by opening the throttle valve further,
depending on coolant temperature and engine load (increased mixture), or closing it further (reduced
mixture).
In this case, the throttle valve may be closed further by the actuator motor by overcoming the force of the
sprin
g capsule (mechanical end stop).

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
me
Saturday, October 02, 2010 3:36:27 PMPage 21 © 2006 Mitchell Repair Information Company, LLC.