Remove/install hydraulic valve clearance compensating elements - AR05.00-P-2011GZA (ML350, ML550, GL450, GL550)

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE 272, 273 in MODEL 164, 251

Fig 1: Identifying Roller Drag Lever, Compensating Element And Clamp

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
	Risk of injury caused by pinching or crushing when working on springs or spring bodies that are under tension	Use only approved tensioning devices; shield off hazard area if necessary. Inspect special tools for damage and proper operation (visual inspection). Wear protective gloves.	AS00.00-Z-0001-01A
	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
1	Remove air filter housing		AR09.10-P-1150GZA
2	Remove cylinder head covers	Right cylinder head cover	AR01.20-P-5012GZA
		Left cylinder head cover	AR01.20-P-5013GZA
3	Remove front covers from cylinder heads	Right front cover	AR01.30-P-5700GZC
		Left front cover	AR01.30-P-5700GZA
4	Remove camshafts		AR05.20-P-6992GZA
5	Take out cam follower (1) with compensating element (2)	When removing several compensation elements (2) make sure that the roller-type cam follower (1) with the compensation elements (2), which were not replaced, are reinstalled at the previous fitting point. Mark the cam follower (1) for the corresponding compensating element (2) if necessary. Installation: Oil cam follower (1) and compensating element (2).
6	Detach clamp (3) by hand and remove compensating element (2) from cam follower (1)
	Checking
7	Check that compensating element (2) is functioning properly, and replace if necessary	Only press compensating element (2) together hand, do not use any steel tool, otherwise the surface of the compensating element (2) can be damaged. The compensating element (2) should not allow itself to be pressed together by the normal force of the hand and also only slowly when using a strong force. Check pressure oil supply to the cylinder head if more than one compensating element (2) is faulty.
8	Install in the reverse order
	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
9	Check for oil leaks with engine running