Remove/Install Left Cylinder Head - AR01.30-P-5770MNA

Engine 176 in model 463 

up to model year 2019 

Engine 177 in model 205 

Fig 1: Left Cylinder Head Component Location - Model 205 With Engine 177

Courtesy of MERCEDES-BENZ USA

	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 suffering scalding from contact with hot coolant spray. Risk of poisoning  from swallowing coolant.	Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-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
	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
Notice	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
Notice	Notes on coolant		AH20.00-P-2080-01KOA
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Notice	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Notes on threaded connections with aluminum screws/bolts		AH00.00-P-0006-01RM
	General information on work on gasoline direct injection system		AH07.00-P-2000-01A
	Remove/install
1	Remove left secondary chain drive timing chain.		AR05.10-P-7614MNA
2	Remove left secondary chain drive tensioning rail.		AR05.10-P-8129MNA
3	Remove left secondary chain drive slide rail.		AR05.10-P-8481MNA
4	Remove both camshafts from cylinder head (1).		AR05.20-P-6992MNA
5	Remove left exhaust manifold.		AR14.10-P-3006MNA
6	Remove fuel line from front cylinder head (1).
7	Remove coolant line from cylinder head (1).
8	Remove shutoff valve.		AR20.00-P-0300MNA
9	Loosen cylinder head bolts (2) in stages in reverse order of tightening procedure and	Tightening specifications for cylinder head bolts	AR01.30-P-5800-07MNA
		Tightening procedure for cylinder head bolts Observe tightening procedure and tightening specification. Replace cylinder head bolts (2).	AR01.30-P-5800-01MNA
		Bolt, cylinder head to crankcase	*BA01.30-P-1001-01N
10	Remove cylinder head (1) from crankcase. General information on checking valves, valve seats and valve guides	Fit a new cylinder head gasket on the crankcase. Pay attention to the pilot bushing for fixing the cylinder head (1) in place.	AH05.30-P-1000-02SZ
	Clean
11	Clean sealing surfaces on cylinder head (1) and on crankcase.	Do not use any sharp-edged tools or abrasive paper. This may otherwise cause damage to sealing surfaces and, subsequently, engine and environmental damage. Mechanical processing and/or cleaning of sealing surfaces by means of spot grinding with abrasive paper or other abrasive materials to remove sealing residue is not permitted. Even the smallest amounts of corundum and grinding particles as well as wear debris that enter into the engine oil chamber, bearing points, or combustion chambers lead to damage and thus cause engine damage. The sealing surfaces must feel even after treatment. The sealing surfaces need not be metallic bright; thin layers of firmly adhering silicone sealant may remain. Cleaning is permitted only with the approved adhesive and sealant remover. Observe processing information from manufacturer.	AR01.00-P-0050-01A
		Loctite 7200	*BR00.45-Z-1038-04A
		Loctite 7063 (400 ml) cleaning spray	*BR00.45-Z-1046-04A
12	Blow out threaded holes of cylinder head bolts (2) in crankcase with compressed air and clean away engine oil and coolant.
	Check
13	Check sealing surfaces on the cylinder head (1) and crankcase for cracks and unevenness and replace if necessary.	Any distortion of the cylinder head (1) occurring in the longitudinal or transverse directions will be balanced out again during reassembly through tightening of the cylinder head bolts (2). Check relevant sealing surfaces of engine for unevenness, score marks, etc. If unevenness, score marks, etc. are present: ↓ Replace affected component.
14	Install in the reverse order.
15	Change engine oil and oil filter element.
		Engine 176 in model 463.234/239/255 up to model year 2019	AP18.00-P-0101GGE
		Engine 177 in model 205	AP18.00-P-0101D
	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
16	Perform engine test run and check engine and fuel system for leak tightness.