Remove/Install Left Cylinder Head Cover - AR01.20-P-5013MNA

Engine 176 in model 463 

up to model year 2019 

Engine 177 in model 205 

Courtesy of MERCEDES-BENZ USA

Shown on engine 176 in model 463 

Fig 1: Left Cylinder Head Cover Component Location - Model 205 With Engine 177 (Shown On Model 463 With Engine 176)

Courtesy of MERCEDES-BENZ USA

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 front cover at left cylinder head.		AR01.30-P-5711MNA
2	Remove bolts (3) and remove bleed line (4).	Replace seal. Bolt, vent line to cylinder head cover/turbocharger	*BA01.20-P-1001-01J
3	Remove bolts (9) and remove crash plate (10).	Engine 176 in model 463 up to model year 2019 Bolt, shield to cylinder head/cylinder head cover	*BA07.02-P-1002-01E
4	Remove left high-pressure pump.		AR07.02-P-1023MNA
5	Remove fuel injectors of left cylinder bank.		AR07.03-P-0004MNA
6	Remove the ignition coils for the left cylinder bank.		AR15.12-P-2003MNA
7	Remove side heat shield of left exhaust gas turbocharger.	Bolt, side heat shield to cylinder head cover	*BA09.40-P-1007-01ZA
8	Remove screw (5).	Engine 176 in model 463 up to model year 2019
9	Unclip electrical wiring harness (6) at left cylinder head cover (1)	Engine 176 in model 463 up to model year 2019
10	Disconnect cable tie (7) and remove fuel line (8).	Engine 176 in model 463 up to model year 2019
11	Disconnect electrical connectors of position sensors at left cylinder bank.	Engine 176 in model 463 up to model year 2019	AR15.12-P-2144MNF
12	Release bolts (2) of left cylinder head cover (1) in reverse order to tightening procedure and remove.	Bolt tightening procedure for cylinder head cover Observe tightening procedure. replace screws (2).	AR01.20-P-5014-03MNA
		Bolt, cylinder head cover to cylinder head/camshaft housing	*BA01.20-P-1004-01J
13	Carefully pry off left cylinder head cover (1) from left cylinder head and remove. Notes on application of flange sealants to seal major assemblies		AH00.00-P-0500-01MNE
	Notes on sealant path for cylinder head cover	Do not hammer in a tool to pry off between the left cylinder head cover (1) and left cylinder head. The sealing surfaces can be damaged otherwise. Replace rear connection pieces.	AH01.30-P-1000-08MM
		Sealant, Loctite 5970, 50 ml	*BR00.45-Z-1013-01A
		Application gun	Fig 2
14	Remove position sensors of camshafts.	When replacing left cylinder head cover (1) and left cylinder head (parts only available as a unit). Engine 176 in model 463 up to model year 2019	AR15.12-P-2144MNF
		Engine 177 in model 205	AR15.12-P-2144MNA
15	Remove bracket of upper engine cover at left cylinder head cover (1).	When replacing left cylinder head cover (1) and left cylinder head (parts only available as a unit).
16	Remove bracket of vacuum line at left cylinder head cover (1).	Engine 177 in model 205 When replacing left cylinder head cover (1) and left cylinder head (parts only available as a unit).
17	Remove slide rail at left cylinder head cover (1).	When replacing left cylinder head cover (1) and left cylinder head (parts only available as a unit).
	Check
18	Check camshaft mounts in left cylinder head cover (1) and camshafts for galling and score marks. General information on checking camshafts and bearing points of camshafts	If camshaft mounts or camshafts are damaged ↓ Replace left cylinder head cover (1) and left cylinder head (parts only available as a unit).	AH05.20-P-1000-09SZ
			AR01.30-P-5770MNA
	Clean
19	Clean sealing surfaces at left cylinder head and left cylinder head cover (1).	Do not use any sharp-edged tools or abrasive paper. The sealing surfaces can be damaged otherwise.	AR01.00-P-0050-01A
		Loctite 7063 (400 ml) cleaning spray	*BR00.45-Z-1046-04A
		Loctite 7200	*BR00.45-Z-1038-04A
20	Check engine oil level and correct if necessary.
		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
21	Perform engine test run and check engine in terms of leak tightness while engine is running

Fig 2: Identifying Application Gun (112 589 00 25 00)

Courtesy of MERCEDES-BENZ USA