Replace timing chain - AR05.10-P-7601GZ (ML500): Notes

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ENGINE 113.964 in MODEL 164.175

Fig 1: Identifying Timing Chain, Holding Bush And Torx Screws

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Removing
	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 safety glasses. Only pour battery acid into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
1	Disconnect ground cable from battery	Insulate clamping device of the ground line in order to prevent inadvertent contact with the ground point of the battery.	AR54.10-P-0003GZ
	Notes on battery	All models	AH54.10-P-0001-01A
	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 and raise to vertical position		AR88.40-P-1000GZ
3	Remove one spark plug from each cylinder	To ensure that the engine can be easily cranked when drawing in the timing chain and to avoid the timing chain skipping, see. ↓
		Replace spark plugs	AP15.10-P-1580GZ
4	Remove cylinder head covers		AR01.20-P-5014GZ
5	Check the engine valve timing	If necessary: ↓	AR05.10-P-6858GZ
		Set basic position of camshafts	AR05.20-P-6020GZ
6	Remove chain tensioner		AR05.10-P-7800GZ
7	Remove camshaft Hall sensor		AR15.10-P-2000GZ
8	Crank engine in direction of rotation until the link for separating the timing chain is easily accessible	The timing chain is separated one chain link next to the copper plate (on right). See new timing chain.
9	Remove right camshaft bearing bridge		AR05.20-P-7103GZ
10	Install holding bush (3) onto right camshaft	Only fit Torx bolts (4).
		Holding bush	Fig 3
11	Mount retainer for timing chain (on the right) and retainer for timing chain (on the left) for timing chain on the right and left cylinder head	Retainer	Fig 2
12	Separate timing chain	Cover over timing case recess with a clean cloth. Parts which have fallen into the timing case recess, must be removed. Connect the old chain to the new timing chain while pulling out the old timing chain.	AR05.10-P-7601-01AV
		Chain separating tool	Figure
		Pressure screw	Figure
		Thrust pins	Figure
		Case	Figure
	Installing
13	Draw in new timing chain	Always remove the assembly link after drawing in the new timing chain. These are only an assembly aid and not intended for engine running. Pull in the new timing chain by turning the crankshaft in its standard direction of rotation.	AR05.10-P-7601-04AV
		Assembly links	Fig 4
		Case	Figure
14	Remove retainer for timing chain (on the right) (1) and retainer for timing chain (on the left) (2) for timing chain on the right and left cylinder head
15	Rivet new timing chain		AR05.10-P-7601-02AV
			*BA05.20-P-1001-01B
		Riveting tool	Fig 9
		Assembly inserts	Fig 10
		Open-end wrench	Fig 11
		Torque wrench	Fig 12
		Case	Figure
16	Crank engine in direction of rotation
17	Check the engine valve timing		AR05.10-P-6858GZ
18	Remove holding bush (3) from right camshaft
19	Fit right camshaft bearing bridge		AR05.20-P-7103GZ
20	Install camshaft Hall sensor		AR15.10-P-2000GZ
21	Installing chain tensioner		AR05.10-P-7800GZ
22	Install cylinder head covers		AR01.20-P-5014GZ
23	Install spark plugs
	Replace spark plugs		AP15.10-P-1580GZ
24	Connect ground cable to battery		AR54.10-P-0003GZ
	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 running engine	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	AS00.00-Z-0005-01A
25	Conduct engine test run and check the engine for leaks while it is running	In the event of oil loss determine and eliminate cause, otherwise malfunctions, transmission damage, and serious environmental pollution may occur.