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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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Page 2322 of 4133

Camshaft
17Screw retaining fork and
detent with hinged
bearing into cylinder head Valve assembly tools
caseFig. 89
18Attach detent depressor
with lever handle and
thrust piece into detent
with hinged bearing, align Position thrust piece
vertically at valve spring
retainer and align parallel
to detent with hinged
bearing.
Valve assembly tools
caseFig. 89
19Remove upper valve
spring plate (16) and
valve spring (17)Do not allow valves to
touch the piston crowns
otherwise they will be
bent.
Compress valve
spring and remove valve
collets with tweezers or
magnetic finger. The
valve springs of the inlet
and exhaust valves are
identical.
Magnetic fingerFig. 90
Tweezers*WH58.30-Z-1040-02A
20Replace valve stem seals
(18) Inspect surface of
valve stems for
roughness and formation
of burrs (visual
inspection or with a nail).
Replace valves with a
rough stem surface or
formation of burrs: ?AR05.30-P-3500-02A
Remove valves.AR05.30-P-3511AV
21Remove lower valve
spring plate (19)
Checking
22Inspect top and bottom
valve spring retainers (16,
19) Inspect valve spring
retainer for formation of
burrs, replace if
necessary.
23Install in the reverse order
NumberDesignationEngine
112 Engines
113.940/941/
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
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Page 2323 of 4133
Fig. 84: Identifying Locating Plate (112 589 00 32 00)
Fig. 85: Identifying Locating Plate (112 589 01 32 00)
Fig. 86: Identifying Open End Wrench (112 589 00 01 00)
except
112.951/976942/943/944/
948/961/962/
963/964/965/
966/967/968/
969/971/980/
981/982/984/
986/992/995
BA05.20-P-
1001-01BBolt for
camshaft
sprocketM12x45Stage 1Nm5050
Stage 2Angle°9090
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
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Page 2324 of 4133
Fig. 87: Identifying Insertion Tool (112 589 01 03 00)
Fig. 88: Identifying Torque Wrench (001 589 72 21 00)
Fig. 89: Identifying Valve Assemb ly Tool Case (111 589 25 61 00)
Fig. 90: Identifying Magnet Finger (116 589 06 63 00)
Commercially available tools
NumberDesignation
WH58.30-Z-1040-02ATweezers, straight 160 mm with rounded tips
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
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Page 2325 of 4133
REMOVE/INSTALL VALVES - AR05.30-P-3511AV
ENGINE 112 in MODEL 129, 163, 170, 202, 203, 208, 209, 210, 220
ENGINE 113 in MODEL 129, 163, 202, 203, 208, 209, 210, 211.076/276, 215.373/374/375, 220, 230.474/475
ENGINE 112.945 in MODEL 463.209 /232 /233 /244 /245 /250
ENGINE 113.962 in MODEL 463.206 /240 /241 /247 /248 /249 /254
ENGINE 113.982 in MODEL 463.243/246
ENGINE 112.913 in MODEL 211.061/261
ENGINE 112.949 in MODEL 211.065/265
ENGINE 113.967 in MODEL 211.070/270
WH58.30-Z-1015-05ACylinder leakage testing unit
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
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Page 2326 of 4133
Fig. 91: Identifying Valve Components
Remove/install
Risk of death caused
by vehicle slipping or
toppling off the lifting
platform.Align vehicle between columns of
vehicle lift and position four support
plates at vehicle lift support points
specified by vehicle manufacturer.AS00.00-Z-0010-01A
1Remove cylinder head
(1)Model 163.154/157/172/174/175AR01.30-P-5800MV
Model 129 with engine 112, 113
Model 202, 208, 210 with engine
113AR01.30-P-5800B
Model 170, 202, 208, 210, 220 with
engine 112
Model 211.076/276, 215.374, 220,
230.474/475 with engine 113AR01.30-P-5800BA
Model 203 except 203.764, 209, 211AR01.30-P-5800PV
Model 463.2 with engine 112, 113
Model 203.764 AR01.30-P-5800GV
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
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Saturday, October 02, 2010 3:39:38 PMPage 85 © 2006 Mitchell Repair Information Company, LLC.
Page 2327 of 4133

Model 215.373/375
2Mount cylinder head
(1) onto the assembly
board (2) with the
associated insertion
plate (3) Insert insertion plate (3) with
arrow indicating the direction of
travel (insertion pl ate) (4) pointing
to the front and, according to the
cylinder head, for the right or left
side into the assembly board (2).
i004 Mount cylinder head (1)with its
front end pointing to the arrow
indicating the dir ection of travel
(assembly board) (5) with one bolt
(6) each at the front and rear onto
the assembly board (2). The cylinder
head (1) can be mounted on the
assembly board (2) without
removing the exhaust manifold.
Assembly boardFig. 92
3Attach assembly tool
(valves) (7) to
cylinder head (1) and
position vertically at
the valve disk (top)
(8) Use parts 2, 3, 4, 5, 7, 14, 19
from the valve assembly tool case
(valves) (7).
Valve assembly tools caseFig. 89
4Remove valve disk
(upper) (8) and valve
disk (lower) (11) Press valve spring (9) together
with assembly tool (valves) (7),
remove split valve spring retainer
locks (10)
Check valve disk (top) (8) and
valve disk (bottom) (11) for
formation of burrs, replace if
necessary.
The valve springs (9) of the inlet
valves and exhaust valves are
identical.
Magnetic pinFig. 95
Magnetic fingerFig. 90
5Use pliers (15) to
remove valve stem
seals (12) Installation: Fit protective sleeve
for valve stem seal (13) onto valve
stem. Oil valve stem seal (12) and
press on with drift (16). The
protective sleeve for the valve stem
seal (13) must be removed from the
valve stem after pressing on the
valve stem seal (12).
PliersFig. 77
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
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Page 2328 of 4133

DriftFig. 78
6Remove cylinder head
(1) from assembly
board (2)
Risk of explosion
and poisoning caused
by the melting down
or improper handling
of sodium-filled
valves. Risk of injury
caused by skin contact
with sodium resulting
in heat or chemical
burns.Do not open sodium-filled valves.
Wear protective gloves and safety
glasses when handling damaged
valves.AS05.30-Z-0001-01A
7Remove valve (14) Installation: Check surface of
valve stems for roughness and
formation of ridging (visual
inspection or with a nail). Replace
valves (14) with a rough stem
surface or formation of burrs. Grind
new or reused valves (14) with valve
grinding compound before
installation.
Disposal of sodium-
filled valvesExhaust valves with sodium fillingOS05.30-P-0001-01A
Checking
8Check valves (14) Intake and exhaust valves must
not be machined.
If the specified tolerances are
below the required limit, the valve
(14) must be replaced to ensure
functioning.AR05.30-P-4201-
01AV
Valve disk ø*BE05.30-P-1001-
01E
Valve disk height*BE05.30-P-1002-
01E
Valve seat angle (a)*BE05.30-P-1003-
01E
Valve stem ø*BE05.30-P-1004-
01E
Valve length*BE05.30-P-1005-
01E
9Inspect valve guides,
replace if necessary AR05.30-P-3731AV
10Install in the reverse
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:38 PMPage 87 © 2006 Mitchell Repair Information Company, LLC.