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Remove/install chain tensioner - AR05.10-P-7800GZS (ML63 AMG)

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ENGINE 156 in MODEL 164, 251 

Fig 1: Identifying Chain Tensioner, Sealing Ring, Poly-V-Belt And Alternator
G05257389Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
MODIFICATION NOTES

11.10.06 Chain tensioner to timing case Engine 156 *BA05.10-P-1008-01B 
REMOVINGINSTALLING Remove/install    
DANGER Risk of injury  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, tailgates or sliding roof. Keep body parts and limbs well clear of moving parts. AS00.00-Z-0011-01A
DANGER Risk of explosion  caused by oxyhydrogen gas. Risk of poisoning and caustic burns  caused by swallowing battery acid. Risk of injury  caused by burns to skin and eyes from battery acid or when handling damaged lead-acid batteries No fire, sparks, open flames or smoking.
Wear acid-resistant gloves, clothing and glasses. Only pour battery acid into suitable and appropriately marked containers.		 AS54.10-Z-0001-01A
1 Disconnect ground line from battery NOTES Insulate clamping device of the ground line in order to prevent inadvertent contact with the ground point of the battery.  
    Model 164 AR54.10-P-0003GZ
    Model 251 AR54.10-P-0003RT
NOTES Notes on battery All models AH54.10-P-0001-01A
2 Open engine hood and raise to vertical position Model 164 AR88.40-P-1000GZ
    Model 251 AR88.40-P-1000RT
3 Remove the left and right intake air duct    
4 Remove front engine cover NOTES Do not tilt front engine cover, but lift upwards vertically otherwise the retaining lugs can break off.  
5 Partially remove poly-V-belt (3) IMPORTANT The poly-V belt (3) must be removed from alternator belt pulley (G2). AR13.22-P-1202GZS
6 Loosen alternator (G2) and lay down to side with connected lines   AR15.40-P-5032GZS
    TORQUE SPECIFICATION *BA15.40-P-1001-01P 
    SPECIAL TOOL External Torx set Fig 2
7 Remove chain tensioner (1) from timing case cover IMPORTANTInstallation:  Replace chain tensioner (1).  
    TORQUE SPECIFICATION *BA05.10-P-1008-01B 
8 Install in the reverse order    
9 Perform basic programming Model 164 AR00.19-P-0200GZ
    Model 251 AR00.19-P-0200RT
INSPECT Checking     
DANGER Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the engine as it is running Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not touch hot or rotating parts.		 AS00.00-Z-0005-01A
10 Check for leaks with engine running    
ALTERNATOR

Number Designation Engine 156
BA15.40-P-1001-01P Bolt, alternator to timing case M8 x 90 Nm 20
TIMING CHAIN, CHAIN TENSIONER

Number Designation Engine 156
BA05.10-P-1008-01B Chain tensioner to timing case M22 x 1.5 Nm 75
Fig 2: Identifying External Torx Set (001 589 76 09 00)
G05257390Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
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