Inspect hydraulic valve clearance compensating elements - AR05.00-P-2010AMG (ML63 AMG)

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ENGINE 156

Fig 1: Identifying Drift

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Checking
	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
	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	Open engine hood and raise to vertical position	Model 216, 221
		Model 164	AR88.40-P-1000GZ
		Model 209	AR88.40-P-1000Q
		Model 211	AR88.40-P-1000T
		Model 219	AR88.40-P-1000TX
		Model 251	AR88.40-P-1000RT
2	Check engine oil level, correct if necessary
3	Start engine, bring to normal operating temperature and switch off	Coolant temperature 60 to 80°C.
4	Remove the partition wall between the wheelhouses	Model 251 only	AR62.30-P-2400RT
5	Remove spark plugs	Only if it is not possible to crank the engine due to the high compression.
		Models 164, 251	AR15.12-P-1010GZS
		Models 209, 211, 219	AR15.12-P-1010TMG
		Models 216, 221	AR15.12-P-1010SMG
6	Rotate engine at crankshaft center bolt in direction of rotation of the engine to a 40° crankshaft angle after top dead center (TDC)	Rotate engine at crankshaft in running direction until scribe mark 40° on pulley/ vibration damper corresponds with scribe mark on timing case.
7	Remove cylinder head covers	Models 164, 251	AR01.20-P-5014GZS
		Models 209, 211, 219	AR01.20-P-5014TMG
		Models 216, 221	AR01.20-P-5014SMG
8	Press down the compensating element with a drift (1)	Never use a steel tool to avoid damaging the surfaces. The compensating element should be pressed together very slowly with the normal force of the hand. Do not apply strong pressure. If the compensating element drops too strongly: ↓
		Replace the compensating element If more than one compensating element is faulty, check the pressure oil supply to the cylinder head.	AR05.00-P-2011AMG
9	Install in the reverse order
10	Conduct engine test run and check the engine for leaks