Page 2249 of 4133

RISK OF EXPLOSION AND PO ISONING - AS05.30-Z-0001-01A
Do not open sodium-filled valves. Wear protectiv e gloves and safety glasses when handling damaged
valves.
Exhaust valves fill ed with sodium
Potential risks
Risk of explosion
Explosion may occur when melting down sodium-filled va lves. Sodium has a very low self-ignition temperature
(121 °C) and may spontaneously ignite in moist air.
Improper disposal may lead to fires due to moisture in scrap containers.
Risk of poisoning
The inhalation of toxic vapors causes severe irritation, shortness of breath, headaches, nausea and vomiting.
Risk of injury
Leaked sodium that comes into contact with moist body tissue (perspiration on hands, tears) may undergo a
severe, explosive reaction and generate heat. This may lead to skin ir ritation and burns, and to corneal damage
with possible blinding.
Safety instructions/precautions
Keep water and sources of heat and ignition away from sodium.
When handling damaged, sodium-filled valves, wear su itable protective gloves and safety glasses, if
necessary.
Never machine sodium-filled valves.
Do not open sodium-filled valves.
Observe all additional safety requireme nts and regulations in your country.
First aid measures
Skin and eye contact
Remove sodium, treat the injured area with an oily solution, e.g. Biseptol and consult a physician.
Risk of explosion and poisoning caused by the melting down
or improper handling of sodium-f illed valves. Risk of injury
caused by skin contact with s odium resulting in heat or
chemical burns.ENGINE 111, 112, 113,
137, 155, 156, 166, 266,
646, 647, 648 ...AS05.30-Z-
0001-01A
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
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Page 2250 of 4133

Ingestion
Do not give the affected person a nything to drink, consult a physician.
Vapor inhalation
Move the victim out of the risk area.
If victim has the urge to vomit, give him/her oxygen.
In the event of respiratory failure, administ er artificial respiration and notify a physician.
TESTING & REPAIR
REMOVE/INSTALL HYDRAULIC VALVE CLEARANC E COMPENSATION ELEMENTS - AR05.00-P-2011B
ENGINE 112.945 in MODEL 463.209 /232 /233 /244 /245 /250
ENGINE 112 in MODEL 129, 163, 170, 202, 203, 208, 209, 210, 220
ENGINE 113.962 in MODEL 463.206 /240 /241 /247 /248 /249 /254
ENGINE 113 in MODEL 129, 163, 202, 203, 208, 209, 210, 215, 220, 230.474 /475
ENGINE 112.913 in MODEL 211.061/261
ENGINE 112.949 in MODEL 211.065/265
ENGINE 113.967 in MODEL 211.070/270
ENGINE 113.982 in MODEL 463.243/246
ENGINE 113.990 in MODEL 211.076/276
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 9 © 2006 Mitchell Repair Information Company, LLC.
Page 2251 of 4133
Fig. 8: Identifying Hydraulic Valve Clea rance Compensation Element Components - Shown On Engine
112 In Model 210
Shown on engine 112 in model 210
Remove/Install
1
Remove cylinder
head covers with
ignition coils (6)Air cleaner mounted on vehicle.AR01.20-
P-5014B
Air cleaner positione d at engine side.
AR01.20-
P-
5014BV
2
Position
crankshaft to 0°
after ignition
TDC of cylinder
1
The engine must not be turned back; otherwise the chain can get
jammed.
AR05.10-
P-6858V
Model 129,
463.206/209/232/233/240/241/243/2 44/245/246/247/248/249/250/254,
Model 163 except 163.174/175, Model 202, 208, 210 with engine 113AR05.10-
P-7800C
Model 163.174/175, Model 209 with engine 113.987 up to 23.4.04, AR05.10-
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
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Page 2252 of 4133

CHECK THE ENGINE VALV E TIMING - AR05.10-P-6858V
ENGINE 112
ENGINE 113.962 in MODEL 463.206 /240 /241 /247 /248 /249 /254
ENGINE 113.982 in MODEL 463.243/246
ENGINE 113 (except 113.995) in MODEL 129, 163, 202, 203, 208, 209, 210, 211, 215, 220, 230
3Remove chain
tensioner (5)
Model 209 with engine 113.968
Model 170, 202, 203, 208, 209, 210 with Engine 112P-
7800CA
Model 203 with engine 113.988
Model 209 with engine 113.987 as of 24.4.04AR05.10-
P-
7800AC
Model 211, 215, 220, 230
AR05.10-
P-
7800AM
4
Detach left
camshaft bearing
bridge (7) and
right camshaft
bearing bridge
(8)
Engine 112, 113 except cylinder shutoff, code 479.
AR05.20-
P-
7103AU
Engine 113.960 with cylinder shutoff, code 479.
AR05.20-
P-
7103AV
Installation: AR05.10-
P-6858V
Check basic position of cam shafts, if required: ? Set the basic position of
camshaftsAR05.20-
P-
6020AU
5
Use a 2 mm drift
to press
compensation
element (11) of
the relevant
cylinder out of
the roller rocker
arms (9) Do not use a magnet!
The slide surface of the compensation element (11) would get
magnetized. This can cause minute iron chips to accumulate, which in
turn can damage the compensati on element (11) and the cam.
Installation: The small plate at the top of the roller-type rocker arm
must point to the compensation element with the slits facing downwards
(11). Compensation elements which have not been replaced, must be
reinstalled at the same point.
6Install in the
reverse order
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 11 © 2006 Mitchell Repair Information Company, LLC.
Page 2253 of 4133
Fig. 9: Identifying Engine Va lve Timing, Pin On Crankcase - Shown On Engine 112
Shown on engine 112
Inspect basic position of ba lancing shaft only engine 112
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 12 © 2006 Mitchell Repair Information Company, LLC.
Page 2254 of 4133

Fig. 10: Locating Notch In Balancing Weight, Pin On Crankcase
Remove/install
1Remove
cylinder head
covers Air filter located
at vehicle side.
Air filter located on engine side.
2.1Unbolt
combination
valve (on right) Only for engines with air pump.
Installation: Replace Gasket of combination valve.
Checking
3Inspect timing Engine 112.910/911/912/920/921/ 922/923/940/941/942/942/944/945/946/947/949, Engine
113.940/941/942/943944/960//961/962/963/965/ 967/968/980/981/982/984/987/990/991/99
2
Engine 113.960 with cylinder shutoff code 479 see: ?
Inlet
Outlet
Camshaft code
number and
assignmentEngine 112, 113
4Position engine
to 40° after
ignition TDC
of cylinder 1 Rotate engine at crankshaft in direct ion of rotation until 40° marking on belt
pulley/vibration damper is aligned with mark ing on timing case cover. Slots at camshafts
must be pointing in di rection of inner V.
The engine must not be turned back; otherwise the timing chain can get jammed.
5Check basic
position of
camshafts Place locating plate for right camshaft (2) fl
ush onto the right cylinder head and insert
into the groove in the camshaft (6). Proceed the same way with the left-hand camshaft in th
e
left-hand cylinder head.
If both locating plates cannot be inserted into the grooves: ?
Set the basic position of camshafts.
6.1Inspect basic
position of the
balancing shaftOnly for Engine 112, see figure.
The markings of the pin at front crankcase (A) and the notch in the correctional weight
(B) on the front end of the corr ectional weight point to each ot her. The two scribe marks ca
n
be seen through the left timing case duct at a depth of about 22 cm from the cylinder head
cover joint surface.
7Install in the
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
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Page 2255 of 4133

Test values for timing
Test values for timing
reverse order
NumberDesignationEngines
112.910/911
left-handEngines
112.910/911
right-handEngines
112.910/913/920/921/922/923 on
the left
BE05.20-
P-1001-
02FTiming of
inlet
valve
with 2
mm play
and used
timing
chainopens
after
TDC°CA24.926.526.9
closes
after
BDC°CA20.221.823.2
BE05.20-
P-1002-
02FTiming
of
exhaust
valve
with 2
mm play
and used
timing
chainopens
before
BDC°CA28.126.529.1
opens
after
BDC°CA---
closes
before
TDC°CA13.111.514.1
NumberDesignationEngines
112.912/913/920/921/922/923
rightEngines
112.940/941/942/943/944/945/946/947/948/949/95
1
left
BE05.20-
P-1001-
02FTiming
of inlet
valve
with 2
mm
play
and
used
timing
chainopens
after
TDC°
CA28.524.9
closes
after
BDC°
CA24.825.9
BE05.20-
P-1002-
02FTiming
of
exhaust
valve
with 2
mm
play
and opens
before
BDC
°
CA27.531.5
opens
after
BDC°
CA--
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 14 © 2006 Mitchell Repair Information Company, LLC.
Page 2256 of 4133

Test values for timing
Test values for timing
used
timing
chaincloses
before
TDC
°
CA12.512.1
NumberDesignationEngines
112.940/941/942/943/944/945/946/947/948/949/951/976
rightEngines
113.940/941/942/943
left
BE05.20-
P-1001-
02FTiming
of inlet
valve
with 2
mm
play
and
used
timing
chainopens
after
TDC°
CA26.531.9
closes
after
BDC°
CA27.528.2
BE05.20-
P-1002-
02FTiming
of
exhaust
valve
with 2
mm
play
and
used
timing
chainopens
before
BDC
°
CA29.924.1
opens
after
BDC°
CA--
closes
before
TDC
°
CA10.59.1
NumberDesignationEngines
113.940/941/942/943 on the
rightEngine
113.940/94
BE05.20-P-
1001-02FTiming of
inlet valve
with 2 mm
play and used
timing chainopens after
TDC°CA33.526
closes after
BDC°CA29.834
BE05.20-P-
1002-02FTiming of
exhaust valve
with 2 mm
play and used
timing chainopens before
BDC°CA22.534
opens after
BDC°CA--
closes before
TDC°CA7.514
2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 15 © 2006 Mitchell Repair Information Company, LLC.