park MERCEDES-BENZ ML350 1997 Complete Repair Manual

position sensor (11)
11Remove camshaft
sprockets (10) Lock right and left
camshaft with locating
plates.
Locating plateFig. 11
Locating plateFig. 12
Open-end wrenchFig. 22
Insertion toolFig. 66
Torque wrench001589722100
*BA05.20-P-1001-01B
After installation: ?
Inspect timing of engine.AR05.10-P-6858V
? If necessary after
checking:
Set basic position of
camshafts.AR05.20-P-6020AU
12Remove camsha ft bearing
bridges (9)Engines 112, 113 except
code (479) Cylinder
shutoff.AR05.20-P-7103AU
Engine 113 with code
(479) cylinder shutoff.AR05.20-P-7103AV
13Position piston of cylinder
to be processed to TDC Crank engine at
crankshaft for this
purpose and hold up
timing chain (so that it
does not jam).
Installation: Before
installing the camshaft
sprockets, again turn
back the crankshaft in the
starting position to 40 °
as per ignition TDC at
the first cylinder.

14Install retaining lock (13)
for crankshaft After setting TDC of
cylinder to be processed,
in order to prevent
crankshaft turning
further.AR03.30-P-5000B
15Connect up cylinder leak
tester (12) Turn connection
hose of cylinder leak
tester into the relevant
spark plug hole.*WH58.30-Z-1015-05A
16Pressurize compression
chamberWith a pressure of about
5 bar.

2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
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1998-2005 ENGINE
Complete engine - 163 Chassis
GENERAL INFORMATION
DETERMINE LOSS OF PR ESSURE AT CYLINDER - AH01.00-N-1300-02A
All engine
If an increased pressure loss was found with the cylinde r leak tightness tester, inspect engine by listening at
cylinder head gasket, air intake area, exhaust, oil fi ller opening and prechamber or spark plug bores of the
adjacent cylinder or cylinders.
Check the coolant in the coolant expansion reservoir for the formation of air bubbles.
Possible causes for the pressure loss are: 1. Outlet of air through prechamber or spark plug bo re of adjacent cylinder or cylinders, air bubbles
in coolant expansion reservoir:
pressure loss at cylinder head gasket
2. Outlet of air through air intake area:
For inspecting by listening, open throttle valve pressure loss at inlet valve(s)
3. Outlet of air through exhaust:
pressure loss at exhaust valve(s)
4. Outlet of air through oil filler opening:
pressure loss through pistons and piston rings
It is possible to pinpoint the pressure loss of the rele vant cylinder by spraying with engine oil. Engine oil
seals off the gap between piston and cylinder briefly.
If a reduced pressure loss now occurs for a short time, th e cause is very likely to be at the pistons, piston rings
or cylinder contact surface of the relevant cylinder.
Determining the cause can be falsified by the position of th e piston ring joints. If suspicion exists that the loss o
f
pressure is caused by the piston ring joints being positioned directly one above the other, fit parts to engine and
repeat test after running engine for a short time.
GENERAL INFORMATION ON INSPECTING CYLINDER WALLS - AH01.00-P-0300-01A

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
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Saturday, October 02, 2010 3:17:55 PMPage 1 © 2006 Mitchell Repair Information Company, LLC.
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Fig. 17: Inspecting Cylinders With Light Probe
Shown on engine 112
Remove/install
Risk of death caused by
contact with parts
conducting high voltages.Do not touch parts which
conduct high voltages.
Persons who have
electronic implants (e.g.
pacemakers) must not
perform any work on the
ignition system.AS15.10-Z-0001-01A
Risk of injury to skin and
eyes caused by handling
hot or glowing objects.Wear safety gloves,
protective clothing and
safety glasses, if necessary.AS00.00-Z-0002-01A
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
1Remove a spark plug from
each cylinderType 208.474
Type 202.088
Model 210.062/262
Replace spark plugsModel 129 with engine
112.923/943, 113.961AP15.10-P-1580AC
Model 163 with engine
112, 113AP15.10-P-1580GH
Model 209, 210 except
210.062 /262, 208 except
208.474, 202 except
202.088 with engine 112,
113
Model 203, 170 with
engine 112AP15.10-P-1580A
Model 215, 220 with
engine 137
Model 215, 220, 230 with
engine 275
Model 215, 220 with
engine 285AP15.10-P-1580L
Model 211 with engine
112, 113
Model 215 with Engine
113 AP15.10-P-1580AB

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
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Saturday, October 02, 2010 3:17:56 PMPage 26 © 2006 Mitchell Repair Information Company, LLC.

Model 220 with engine
112, 113
Model 230 with engine
112, 113
Model 240 with engine
285AP15.10-P-1580H
Model 463 with Engine
112, 113AP15.10-P-1580GA
2.1Remove bottom engine
compartment panelingModel 240AR61.20-P-1105H
3Position piston of cylinder
to be inspected to BDCTo do this, crank the
engine at the central bolt of
the crankshaft in the
direction of rotation of the
engine: ?
Firing orderAR01.00-P-1300-03HA
4Connect cylinder
inspection lamp (05) and
insert the flexible test
probe for the inspection
lamp via the spark plug
bore into the respective
cylinder Cylinder inspection
equipment*WH58.30-Z-1014-05A
Flexible inspection light*WH58.30-Z-1006-05A
Flexible inspection light*WH58.30-Z-1007-05A
Check
5Inspect cylinder walls Normal condition:
Mat-grey surface, no
honing pattern.
If the condition of the
cylinder wall is not clearly
recognizable: ?
Model 129, 163, 170, 202,
203, 208, 209, 210,
215,220,230,463
Remove cylinder head
Model 129 with engine
112, 113AR01.30-P-5800B
Model 202, 208, 210 with
engine 113
Model 163 with engine
112, 113AR01.30-P-5800MV
Model 170, 202, 208, 210
with engine 112AR01.30-P-5800BA
Model 220 with engine
112, 113
Model 230 with engine

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 27 © 2006 Mitchell Repair Information Company, LLC.

connection for hot
film mass air flow
sensor (HFM-SFI)
for this step and
unbolt resonance
pipe at cylinder
head cover.

The resonance pipe is
attached to the rear of the
intake manifold with a
plastic bracket.

Do not damage plastic
plate.
5Remove spark plugsRemove only one spark
plug at each cylinder: ?
Models 210, 208, 202
with engine 112
Model 210 with engine
113AP15.10-P-1580A
Model 163 with engines
112, 113AP15.10-P-1580GH
6Crank engine with starter.Do not crank engine at
steering lock but use
contact switch of the
compression recorder.
Crank engine several
times with the starter in
order to eliminate
combustion residues in
the cylinder.AR01.10-P-0110V
Checking
7Insert compression tester
into spark plug bore Fig. 21
8Open throttle valve
9Crank engine with starterDo not crank engine at
steering lock but use
contact switch of the
compression recorder.
To check the
compression pressure,
crank the engine by at AR01.10-P-0110V

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
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covers and sealing ring of the hot
film air mass sensor in the air
filter housing with lubricant.
Models 230.474, 203.065/265,
170.466AR09.10-P-1150SVK
Lubricant
*BR00.45
-Z-1002-
06A
3Remove spark plugs Remove only one spark plug
per cylinder: ?
Models
463.209 /232 /233 /244 /245 /250
with engine 112.945.AP15.10-P-1580GA
Models
463.206 /240 /241 /247 /248 /
249 /254 with Engine 113.962.
Models 463.243 /246 with Engine
113.982
Models 211, 220, 230.474/475AP15.10-P-1580AB
Models 210, 208, 203, 202, 170,
129AP15.10-P-1580A
4.1Remove key from
electronic ignition switch
(EIS)Models 211,230.474/475
Vehicles with code (889)
Keyless Go: Press the start/stop
button repeatedly until the ignition
is switched off.

5Crank engine with
starter. Do not crank engine at steering
lock but use contact switch of the
compression recorder.
In order to remove the
combustion residue from the
cylinders, crank the engine for
about 5 seconds with the starter.
All except model 203AR01.10-P-0110V
Model 203AR01.10-P-0110PV
Checking
6Insert compression tester
into spark plug bore Compression recorderFig. 21
7Open throttle valveExcept models 211, 230.474/475
8Crank engine with
starter. Do not crank engine at steering
lock but use contact switch of the
compression recorder.
All except model 203AR01.10-P-0110V
Model 203AR01.10-P-0110PV

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
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Saturday, October 02, 2010 3:17:56 PMPage 34 © 2006 Mitchell Repair Information Company, LLC.

Fig. 30: Identifying Components For Inspecting Cylinders For Leaks
Shown on Engine 112
Remove, Install

1Risk of accident from
vehicle starting off by
itself when engine
running. Risk of injury
suffered in the form of
bruises or burns to the
hands when reaching in
while the engine cranks
or runs
Bring engine to operating
temperature (approx. 80 °
C)Secure vehicle to prevent it
from moving off by itself.
Wear closed and close-
fitting work clothes.
Do not grasp hot or rotating
parts.
Check the cylinder for
leaks only when the engine
is at normal operating
temperature.AS00.00-Z-0005-01A

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
2Open cap (2) of
expansion reservoirIn Model 463 with Engine
112, 113, a cap (2) with a
detent is built-in
Turn cap carefully up to the
first pre-detent, relieve the
pressure and then unscrew
the cap (2).
A 1-stage cap is fitted to
Model 163 with Engine
112, 113.
Turn the 1-stage and 2-
stage cap half a revolution
counterclockwise, relieve
the pressure, then unscrew
the 1-stage or 2-stage cover.
3Remove a spark plug
(19) from each cylinder
Model 202, 208, 209, 210
with Engine 112, 113.AP15.10-P-1580A

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 40 © 2006 Mitchell Repair Information Company, LLC.

Model 203, 170 with
Engine 112.
Model 163 with Engine
112, 113.AP15.10-P-1580GH
Model 215, 220 with
Engine 137.AP15.10-P-1580L
Model 230.474/475, 211,
220 with Engine 112, 113AP15.10-P-1580AB
Model 240 with Engine
285.AP15.10-P-1580H
Model 463 with Engine
112,113AP15.10-P-1580GA
4Position piston of
cylinder to be tested to
ignition TDC Crank the engine at the
center bolt of the crankshaft
in the direction of rotation
of engine.
5Connect cylinder leak
tester (04) Calibrate cylinder
leakage tester (04) and
screw the connection hose
into the spark plug bore
Cylinder leak tester
*WH58.30-Z-1015-05A
6Remove the oil filler cap
(3)
Inspection
7Apply compressed air to
the cylinder, read off
pressure loss on the
cylinder leakage tester
(04) and determine the
cause if there is an
increased pressure lossCylinder leaktightness
permissible loss total
indication*BE01.00-P-1001-02Z
Cylinder leaktightness
permissible losses at valves
and cylinder head gasket*BE01.00-P-1002-02Z
Cylinder leaktightness
permissible losses at pistons
and piston rings*BE01.00-P-1003-02Z
If the crankshaft rotates: ?
Engine 112, 113, 137.
Install retaining lock for
crankshaft
AR03.30-P-5000B
Engine 285.
Lock crankshaft with
counterholder.
Retainer
Fig. 31
8Conduct the test of the
other cylinders in the
firing order of the engine AR01.00-P-1300-03HA
9Install in the reverse

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
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Saturday, October 02, 2010 3:17:56 PMPage 41 © 2006 Mitchell Repair Information Company, LLC.

Fig. 47: Identifying Transmission Support - Shown On Engine 112.942
Modification notes
13.1.06Bolt, torque converter to drive plateTransmission 722.6*BA27.20-P-1002-01C
Remove/install
Risk of death caused
by vehicle slipping
or toppling off the
lifting platform.Align vehicle between columns of lifting
platform and position f our support plates at
lifting platform suppor t points specified by
vehicle manufacturer.AS00.00-Z-0010-
01A
Notes on self-locking
nuts and boltsAll modelsAH00.00-N-0001-
01A
External Torx setFig. 49
Torx bit setFig. 48
6 mm socket hexagon*WH58.30-Z-
1001-06A
7 mm socket hexagon*WH58.30-Z-
1002-06A
1Remove engine trim
panel
2
Inspect both rear
engine lifting eyes
for marking
Engine suspensi on lugs without
identification must be replaced.


Rear lifting eyes of
engine reinforced
BT01.00-P-0001-01A
Risk of explosion
caused by
oxyhydrogen gas.
Risk of poisoning
and caustic burns
caused by No fire, sparks, open fl ames or smoking. Wear
acid-resistant gloves, clothing and glasses.
Only pour battery acid into suitable and
appropriately marked containers.AS54.10-Z-0001-
01A

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 52 © 2006 Mitchell Repair Information Company, LLC.

housing coolant line
--> (17) from
thermostat housing
15.1Remove radiator Only engine 113.942 /965 /981.AR20.20-P-
3865HC
16Remove brake
pressure regulator
vacuum line (5) from
brake pressure
regulator at rear of
intake manifold
17Extract power
steering pump (19)
oil Hand pumpFig. 50
18Detach return flow
line and pressure line
of power steering
pump (19) Seal connections!
Set of plugsFig. 51
*BA46.30-P-
1002-01A
*BA46.30-P-
1003-01A
19Remove regeneration
vacuum line (6) from
intake pipe
Risk of explosion
caused by ignition of
flammable products,
risk of poisoning
caused by inhaling
fuel vapors or
swallowing fuel as
well as risk of
injury to skin and
eyes exposed to fuel.No fire, sparks, ope n flames or smoking.AS47.00-Z-0001-
01A
Pour fuels only into suitable and appropriately
marked containers.
Wear protective clothing when handling fuel.
20Disconnect fuel line
(4) Release fuel pressure through service valve!
Collect fuel.
M112: ?
*BA07.52-P-
1001-01A
M113: ?
*BA07.52-P-
1001-01A
Pressure hoseFig. 52
21Detach coolant line
(14)

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 55 © 2006 Mitchell Repair Information Company, LLC.