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Testing compression pressure - AR01.00-P-1200GZ (ML500)

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ENGINE 113.964 in MODEL 164.175 

Fig 1: Testing Compression Pressure (Engine 113.964)
G05257135Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
REMOVINGINSTALLING Remove/install    
DANGER Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns when working in engine during starting procedure Secure vehicle to prevent it from moving.
Wear closed and snug-fitting work clothes.
Do not grasp hot or rotating parts.		 AS00.00-Z-0005-01A
1 Bring the engine up to operating temperature (approx. 80°C) IMPORTANT Test compression pressure only when engine is at normal operating temperature.  
DANGER Risk of injury  caused by fingers being jammed or pinched  when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. When moving components, ensure that no body parts or limbs are within the operating range of moving parts. AS00.00-Z-0011-01A
2 Open engine hood   AR88.40-P-1000GZ
3 Remove air filter housing   AR09.10-P-1150GZ
4 Remove a spark plug from each cylinder    
REFER TO MAINTENANCE Replace spark plugs   AP15.10-P-1580GZ
5 Switch ignition off, remove ignition key (transmitter key). IMPORTANT On vehicles with Keyless Go, code 889: Press keyless go start/stop button repeatedly until ignition is switched off  
6 Crank engine with starter IMPORTANT Crank engine by pressing contact switch at compression tester (01).
IMPORTANT In order to remove the combustion residue from the cylinders, crank the engine for about 5 seconds with the starter.		 AR01.10-P-0110GZ 
INSPECT Check     
7 Insert compression tester (01) into spark plug bore SPECIAL TOOL Compression recorder Fig 2
8 Crank engine with starter. IMPORTANT Crank engine by pressing contact switch at compression tester (01). AR01.10-P-0110GZ 
9 Perform inspection of the other cylinders at the same time as the first cylinder    
10 Compare measurements obtained with the specified pressures Compression pressure, tolerance when installed or new value *BE01.00-P-1001-01D 
    Compression pressure wear limit or limit value *BE01.00-P-1002-01D 
    Compression pressure, permissible difference between individual cylinders
IMPORTANT If the pressure is below the minimum compression pressure or if the permissible difference between the individual cylinders is exceeded:↓		 *BE01.00-P-1003-01D 
    Inspect cylinders for leaks AR01.00-P-1300GZ 
11 Install in the reverse order    
COMPRESSION PRESSURE

Number Designation Engine 113.964
BE01.00-P-1001-01D Compression pressure, tolerance when installed or new value bar 9...12
BE01.00-P-1002-01D Compression pressure wear limit or limit value bar 9.0
BE01.00-P-1003-01D Compression pressure, permissible difference between individual cylinders bar 1.5
Fig 2: Identifying Compression Recorder (001 589 76 21 00)
G05257136Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
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