Page 2393 of 4133
Fig. 23: Identifying Firing Order (Engines 602, 605)  
Fig. 24: Identifying Firing Order (Engines 603, 606)
  
Fig. 25: Identifying Firing Order (Engine 112)
 
2001 Mercedes-Benz ML320 
1998-2005 ENGINE Complete engine - 163 Chassis  
me  
Saturday, October 02, 2010 3:17:56 PMPage 37 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 2394 of 4133
Fig. 26: Identifying Firing Order (Engine 113)  
Fig. 27: Identifying Firing Order (Engine 273)
  
Fig. 28: Identifying Firing Order (Engine 272)
  
ENGINES 137,275,285    
 
2001 Mercedes-Benz ML320 
1998-2005 ENGINE Complete engine - 163 Chassis  
me  
Saturday, October 02, 2010 3:17:56 PMPage 38 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 2395 of 4133
Fig. 29: Identifying Firing Order (Engines 137,275,285) 
INSPECT CYLINDERS FO R LEAKS - AR01.00-P-1300HV 
ENGINE 112,137,285   
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 113 (except 113.995) in MODEL 129, 163, 202, 203, 208, 209, 210, 211, 215, 220, 230    
 
2001 Mercedes-Benz ML320 
1998-2005 ENGINE Complete engine - 163 Chassis  
me  
Saturday, October 02, 2010 3:17:56 PMPage 39 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 2396 of 4133

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.  
     
        
        Page 2397 of 4133

 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  
me  
Saturday, October 02, 2010 3:17:56 PMPage 41 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 2398 of 4133
Cylinder leakage   
Fig. 31: Identifying Counterholder (112 589 00 40 00)
  
Commercially available tools   
DISCONNECTING AND CONN ECTING ENGINE WIRING HARNESS - AR01.00-P-2410V 
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     
Shown on Model 163.154    
order
NumberDesignationAll Engines
BE01.00-P-1001-02ZCylinder leakage  
permissible loss total  
indication%< or = 25
BE01.00-P-1002-02ZCylinder leakage  
permissible losses at valves  
and cylinder head gasket%< or = 10
BE01.00-P-1003-02ZCylinder leakage  
permissible losses at 
pistons and piston rings%< or = 20
NumberDesignation
WH58.30-Z-1015-05ACylinder leakage testing unit
 
2001 Mercedes-Benz ML320 
1998-2005 ENGINE Complete engine - 163 Chassis  
me  
Saturday, October 02, 2010 3:17:56 PMPage 42 © 2006 Mitchell Repair Information Company, LLC.  
     
        
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Fig. 32: Identifying Engine Wiring Harness - Shown On Model 163.154  
Fig. 33: Identifying Ground Strap Of Engine/Body 
- Shown On Model 163.154  
Shown on Model 163.154    
 
2001 Mercedes-Benz ML320 
1998-2005 ENGINE Complete engine - 163 Chassis  
me  
Saturday, October 02, 2010 3:17:56 PMPage 43 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 2400 of 4133
Fig. 34: Identifying Motor Electronics Control Module - Shown On Model 163.154  
Shown on Model 163.154     
Fig. 35: Identifying Connector Of   Engine Compartment And Engine 
- Shown On Model 163.154  
Shown on Model 163.154    
  
 Remove/Install  
1Disconnect ground of battery  
(W10)
   Installation: After connecting, read out fault memory,  
encode radio and normalize power windows. 
Vehicles with stationary he  ater: adjust time display on  
stationary heater.
AR54.10-
P-0003A 
2Remove cover of fuse module  
(1)  
3Remove cover of relay module  
(2)  
Remove electronics ground of 
 
2001 Mercedes-Benz ML320 
1998-2005 ENGINE Complete engine - 163 Chassis  
me  
Saturday, October 02, 2010 3:17:56 PMPage 44 © 2006 Mitchell Repair Information Company, LLC.