Remove/Install Left Secondary Chain Drive Chain Tensioner - AR05.10-P-7803MNL

Engine 176 in model 217, 222

MODIFICATION NOTES

21.06.2022	New operation step added.	Operation step 3.
21.06.2022	Special tool 001 589 65 09 00 changed to 177 589 00 03 00.	Operation step 5.

Fig 1: Drive Chain Tensioner Component Location (Left Secondary Chain) - Engine 176 In Model 217

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

	Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
	Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil	Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers.	AS18.00-Z-0001-01A
	Risk of injury caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Notice	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
Notice	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
	Remove/install
1	Remove center and front bottom engine compartment lining.	: Install center and front engine compartment lining only after leak test has been performed.	AR61.20-P-1105LF
2	Position engine at center bolt of crankshaft to a 53° after ignition TDC of cylinder 1.	Only turn engine at the center bolt of the crankshaft in the direction of engine rotation using the specified box wrench. Otherwise, damage to the engine or even failure of the engine may occur.	AR01.10-P-1000-01SZ
		Ring wrench	Fig 2
		Measuring tool	Fig 4
3	Check basic position of camshafts.	: Do not install upper engine cover until after the leak test.	AR05.20-P-6010MNL
4	Position engine in direction of engine rotation at cylinder 1 to a 400 crank angle (CKA) after ignition TDC of cylinder 1 and fix belt pulley with drift.	Only turn engine at the center bolt of the crankshaft in the direction of engine rotation using the specified box wrench. Otherwise, damage to the engine or even failure of the engine may occur. 40° crank angle after ignition TDC of cylinder 1 corresponds to rib (8).	AR01.10-P-1000-01SZ
		Ring wrench	Fig 2
		Measuring tool	Fig 4
		Drift	Fig 3
5	Remove boot (3) with attached purge lines (2)	Bolt, clamp for charge air hose to charge-air distributor	*BA09.41-P-1002-01X
6	Remove secondary chain tensioner (1).	Only turn crankshaft when the secondary chain tensioner (1) is installed. Otherwise, the timing chain skips. : Install new sealing ring for secondary chain tensioner (1).
		Chain tensioner to cylinder head	*BA05.10-P-1003-01V
7	Install in the reverse order.
	Concluding tasks
8	Check engine oil level and correct if necessary.
			AP18.00-P-1812SKI
	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
9	Perform engine test run; in this connection, check engine for proper operation and leak tightness.