Page 2225 of 4133
Fig. 45: Identifying Harmonics - Positive Diode Defective
Fig. 46: Identifying Diode Harmonics OK
REPLACE SPARK PLUGS - AP15.10-P-1580GH
ENGINE 112.942 in MODEL 163.154
ENGINE 112.970 in MODEL 163.157
ENGINE 113.942 in MODEL 163.172
ENGINE 113.981 in MODEL 163.174
ENGINE 113.965 in MODEL 163.175
2001 Mercedes-Benz ML320
1998-2005 ENGINE Electrical System - Engine - 163 Chassis
me
Saturday, October 02, 2010 3:18:55 PMPage 71 © 2006 Mitchell Repair Information Company, LLC.
Page 2226 of 4133
Fig. 47: Identifying Spark Plugs And Cylinder 4 Ignition Coil
Remove/install and
replacing
Risk of death due to
contact with high-voltage
conductive partsDo not touch parts which
conduct high voltages.
Persons who are carriers
of electronic implants
(e.g. cardiac pacemaker)
may not carry out any
work on the ignition
systemAS15.10-Z-0001-01A
Notes on avoiding damage
to ignition systemEngine 104, 111, 112,
113, 119, 120,271AH15.10-P-0002-01D
1Remove/install air filter
upper section
2
Remove ignition coils
Remove/install ignition
coils
AR15.12-P-2003A
3Disconnect spark plug
connectors Prise over cylinder
head cover.
Double open-ended
wrenchFig. 24
Checking
4Check spark plug Replace, if necessary.
2001 Mercedes-Benz ML320
1998-2005 ENGINE Electrical System - Engine - 163 Chassis
me
Saturday, October 02, 2010 3:18:55 PMPage 72 © 2006 Mitchell Repair Information Company, LLC.
Page 2227 of 4133
Spark plugs
Fig. 48: Identifying Spark Plug Wrench (112 589 01 09 00)
Fig. 49: Identifying Open
-End Wrench, Double (110 589 01 01 00)
connectors, ignition coil
connectors and ignition
lines for damage,
deformation and crack
formation
5Remove/install spark plugs
(R4) *BA15.10-P-1001-01A
Spark plug wrenchFig. 48
NumberDesignationEngine
104,110,111,
113.940/941/942/943/
944/948/960/961/962/
963/964/965/966/967/
968/969/971/980/981/
982/984/986/992/993/
995,115,117,119,
120Engines
112.910/911/
912/913/914/
915/916/917/
920/921/922/
923/940/941/
942/943/944/
945/946/947/
949/951/953/
954/955/960/
961/970/972/
973/975/976
BA15.10-P-1001-
01ASpark plugsNm2828
2001 Mercedes-Benz ML320
1998-2005 ENGINE Electrical System - Engine - 163 Chassis
me
Saturday, October 02, 2010 3:18:55 PMPage 73 © 2006 Mitchell Repair Information Company, LLC.
Page 2228 of 4133

GF54.30-P-3011A
Electronic clock, location/function
24.10.96
MODEL
129, 140 as of 1.6.96,
163, 168, 170,
202 as of 1.8.96,
208 up to 31.7.99,
210 as of 1.6.96 up to 30.6.99
P54.30-0520-06
General
A periodic process with a period of high
accuracy is required to measure time (clock)
(e.g. rotation of the earth, pendulum
oscillation.)
Electronic clock
Accordingly an electrical clock signal of high
frequency accuracy is required for an
electronic clock. This clock signal is usually
derived from the very constant mechanical
oscillations of an oscillator crystal. A quartz
(q) with a really high frequency
(e.g. f
1
= 1 MHz) is normally used. This
frequency is then adjusted down to the
required frequency f
2
1 Hz or 1/60 Hz by an
electronic frequency divider (t), i.e. one pulse
is generated every second or minute. The
display unit can be actuated by this pulse. A
stepper motor (s) is used on clocks with a
pointer and a liquid crystal display (I) on
clocks with a digital display.
With an additional circuit (b) the clock can be adjusted via control
buttons.
In addition the time or a time/date pulse is also made available to
other systems (e.g. trip computer, Active Service System (ASSYST),
maintenance display).
Trip computer interface, location/task
GF54.30-P-2016A
Liquid crystal display, location/task/function
GF54.30-P-3015A
Oscillator crystal, function
GF54.30-P-3017A
Stepper motor, location/design/function
GF54.30-P-3009A
Copyright DaimlerChrysler AG 05.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
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Page 1
Page 2229 of 4133

AR47.10-P-4000GH
Empty fuel tank if fuel pump is faulty
28.10.97
MODEL
163.113 with ENGINE 612.963
MODEL
163.128 with ENGINE 628.963
MODEL
163.136 with ENGINE 111.977
MODEL
163.154 with ENGINE 112.942
MODEL
163.157 with ENGINE 112.970
MODEL
163.172 with ENGINE 113.942
MODEL
163.174 with ENGINE 113.981
MODEL
163.175 with ENGINE 113.965
P47.20-2076-06
1
Fondsitzkonsole
2
Cover of left C-pillar
3
Seat retaining cable
4
Wiring harness
P47.10-2077-09
84
Closing cover
90/10
Ground line (vacuum unit)
90/11
Fuel return line
90/12
Fuel feed line
90/13
Stationary heater connection
90/14
Extraction hose
Remove, Install
Danger!
Risk of explosion
from fuel igniting,
risk of
poisoning
from inhaling and swallowing fuel
as well as
risk of injury
to eyes and skin
from contact with fuel.
Fire, sparks, open flames or smoking
forbidden.
Pour fuels only into suitable and appropriately
marked containers.
Wear protective clothing when handling fuel.
AS47.00-Z-0001-01A
Copyright DaimlerChrysler AG 28.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
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Page 1
Page 2230 of 4133

1.1
Unscrew bolts at rear of 2/3 seat bench and
raise rear of seat bench
Up to VIN A145272, X708318.
1.2
Remove covers at seat frame of 60% bench
seat
As of VIN A145273, X708319.
AR91.12-P-1100GH
Only remove the covers which are
identified in the document with A, D and E.
2.1
Fold 60% bench seat forward into footwell
As of VIN A145273, X708319. See
operator's manual.
3.1
Pull floor covering below rear seat mounting
bracket (1) of 60% seat forward
Carefully pull floor covering forward under
the seat console to prevent it from tearing.
As of VIN A145273, X708319.
4.1
Pull the floor covering forward under the front
corner of the left C-pillar cover (2)
Carefully pull the floor covering forward
under the cover to prevent it from tearing.
As of VIN A145273, X708319.
5
Cut into floor covering directly behind seat
retaining cable (3)
Ensure that the wiring harness (4) is not
damaged when cutting the floor covering.
As of VIN A145273, X708319. Broken
line marks the cut.
6
Fold floor mat back
Do not crease floor mat!
Fold floor mat back far enough to provide
access to cap (84) between body and fuel
pump.
7
Remove end cover (84) of body
Installation:
Replace cap and insert with
new sealing compound.
Cap (84) is sealed in with body sealer.
Heat with hot air blower to make it easier to
remove.
8
Seal fuel return line (90/11)
Pliers
*163589003700
9
Connect extraction hose (90/14) with adapter
hose to connection for fuel return line (90/11)
Extraction hose
*168589009000
Adapter hose
*163589009100
10
Connect ground cable (90/10) of extraction
pump ground terminal vehicle battery
Pumping out
11
Pump fuel out into safety container using
extraction pump
*BF47.10-P-1001-01A
*WH58.30-Z-1001-16A
12
Install in the reverse order
Fuel tank
Number
Designation
Models
163.113/
136/154/
172 up to
31.08.01
Models
163.113/
136/154/
172 as of
01.09.01
Models
163.157/
175
Model
163.128
Model
163.174
BF47.10-P-1001-01A
Fuel tank capacity
Total capacity
Liter
72838393
Reserve capacity
Liter
10121212
Copyright DaimlerChrysler AG 28.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 2
Page 2231 of 4133
163 589 00 91 00
Extraction hose
Adapter hose
Pliers
163 589 00 37 00 168 589 00 90 00
Commercially available tools
(see Workshop Equipment Manual)
Number
Designation
Make (e.g.)
Order number
WH58.30-Z-1001-16A
Suction master M2P 20 B
Ecco GmbH
Vonkeln 17
D-42349 Wuppertal
9749 5000 50
Copyright DaimlerChrysler AG 28.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
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Page 3
Page 2232 of 4133

AP18.00-P-0101AR
Engine - oil and filter change
20.1.99
ENGINE
612
Modification notes
12.9.02
Engine oil level modified
Step 9:
Only Model 203:
Up to engine end number: 134 163 oil level
MAX. 135
mm,
MIN 110
mm.
As of engine end number: 134 164 oil level
MAX. 124,5
mm,
MIN 99,5
mm.
Remove
Danger!
Risk of death
cased 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
Danger!
Risk of accident
caused by vehicle starting
off by itself when engine is running.
Risk of
injury
caused by contusions and burns when
working in engine during starting procedure
Secure 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
Change the engine oil only when the engine
is at operating temperature
1
Remove trim panel of cylinder head cover
AR01.20-P-5014-02B
2
Replace oil filter element, drain oil filter
Model 203: Remove clamp attaching fuel
line in order to insert wrench socket.
AP18.00-P-0101-06EG
*BA18.20-P-1002-01G
Socket wrench bit
*103589020900
3.1
Suction off engine oil
AP18.00-P-0101-02Z
4.1
Remove rear left frame cross brace
Only necessary when draining engine oil
at oil drain plug.
MODEL 163
f
Model 203 except 203.018/218/718, 209
AR94.30-P-5300P
Model 210
AR94.30-P-5300AB
4.2
Detach lower engine compartment paneling
Only necessary when draining engine oil
at oil drain plug.
f
Only Model 203.018/218/718
AR61.20-P-1105P
5.1
Unscrew oil drain plug, drain engine oil
Install
6.1
Screw in oil drain plug
Replace sealing ring, in order to avoid
leakage.
*BA01.45-P-1003-01A
7
Pour in engine oil
Note specified and approved quality
grades and viscosity classes conforming to
SAE at enduring ambient temperatures.
*BE18.00-P-1001-02B
*BF18.00-P-1001-01A
g
Viscosity classes of engine oils (car engines)
Sheet 224.1
BB00.40-P-0224-01A
8
Run engine and inspect for leaks
9
Switch off engine
10.1
Fit on bottom part of noise encapsulation
Only necessary when draining engine oil
at oil drain plug.
f
Model 210
AR94.30-P-5300AB
MODEL 203, 209
AR94.30-P-5300P
MODEL 163
10.2
Install lower engine compartment paneling.
Only necessary when draining engine oil
at oil drain plug.
f
Only Model 203.018/218/718
AR61.20-P-1105P
Copyright DaimlerChrysler AG 20.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
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Page 1