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  
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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  
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        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-
 
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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  
 
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1998-2005 ENGINE Engine timing - 163 Chassis  
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        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  
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        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   
 
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1998-2005 ENGINE Engine timing - 163 Chassis  
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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  
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        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
 
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1998-2005 ENGINE Engine timing - 163 Chassis  
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