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Remove/install guide wheel for timing chain - AR05.10-P-7760A (ML550, GL450, GL550)

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ENGINES 273 

Fig 1: Identifying Bearing Bushing, Guide Wheel And Bolts
G07721372Courtesy of MERCEDES-BENZ USA
Figure item, etc.  Work instructions     
IMPORTANT Remove/install timing case cover   AR01.40-P-8000GZA
1 Screw NOTESLeft-hand thread! Observe the loosening direction.   
    TORQUE SPECIFICATION *BA05.10-P-1006-01B 
TIMING CHAIN, CHAIN TENSIONER

Number Designation Engine 273
BA05.10-P-1006-01B Guide pulley to crankcase Nm 55