Remove/install cylinder head cover - AR01.20-P-5014SMG

ENGINE 156 in MODEL 216, 221 

Fig 1: Identifying Cylinder Head Cover Remove/Install Components

Courtesy of MERCEDES-BENZ USA

Shown on left cylinder head cover 

	Remove/install
	Risk of explosion  caused by fuel igniting, risk of poisoning  caused by inhaling and swallowing fuel and risk of injury  to eyes and skin caused by contact with fuel	No fire, sparks, open flames or smoking. Only pour fuels into suitable and appropriately marked containers. Wear protective clothing when handling fuel.	AS47.00-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
	Notes on self-locking nuts and bolts	All models	AH00.00-N-0001-01A
1	Turn key in ignition switch to position "0".
2	Open engine hood and raise to vertical position
3	Remove air filter housing	Do not tilt front engine cover, but lift upwards vertically otherwise the retaining lugs can break off.	AR09.10-P-1150SMG
4	Reduce fuel pressure with pressure hose via the service valve		AR07.03-P-1460-01TMG
		Pressure hose	Fig 2
5	Dismount fuel line at fuel distributor (2)	Catch escaping fuel with an absorbent rag! Seal connections immediately with stop plugs.
		Set of stop plugs	Fig 3
6	Remove ignition coils	Unclip retaining clamps (6) from wiring harness (7) at cylinder head covers.	AR15.12-P-2003SMG
7	Remove bolt (3), remove purge line (4)
8	Remove bolt (5) at wiring harness (8) bracket		*BA01.30-P-1006-01U
9	Loosen bolts of cylinder head cover (1) in the reverse order of the tightening procedure and remove them		AR01.20-P-5014-03AMG
			*BA01.30-P-1004-01U
10	Remove cylinder head cover (1)	To avoid damaging sealing surfaces, do not use any tool for prying off between cylinder head cover (1) and cylinder head.
11	Install in the reverse order
	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
12	Conduct engine test run and check engine for leaks

Fig 2: Identifying Pressure Hose (119 589 04 63 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Set Of Stop Plugs (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA