Remove/Install Right Cylinder Head Cover - AR01.20-P-5012MNA

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: Right 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 the right front cover on the right cylinder head.		AR01.30-P-5712MNA
2	Unscrew the bolts (3) and remove the vent line (4).	Replace seal.
		Bolt, vent line to cylinder head cover/turbocharger	*BA01.20-P-1001-01J
3	Remove right high-pressure pump.		AR07.02-P-1024MNA
4	Remove the fuel injectors in the right cylinder line.		AR07.03-P-0004MNA
5	Remove ignition coils of right cylinder bank.		AR15.12-P-2003MNA
6	Remove the side heat shield for the right exhaust gas turbocharger.	Bolt, side heat shield to cylinder head cover	*BA09.40-P-1007-01ZA
7	Remove the vacuum pump.		AR43.05-P-1320LWD
8	Unclip the vacuum line (7) on the right cylinder head cover (1).	Engine 176 in model 463 up to model year 2019
9	Unscrew the bolt (8) and remove the ground line (9) on the right cylinder head cover (1).	Engine 176 in model 463 up to model year 2019
10	Disconnect the electrical connection for the position sensor for the right exhaust camshaft.	Engine 176 in model 463 up to model year 2019	AR15.12-P-2144MNF
11	Loosen the bolts (2) for the right cylinder head cover (1) in the reverse order of tightening and unscrew.	Bolt tightening procedure for cylinder head cover Observe tightening procedure. Replace screw/bolts (2).	AR01.20-P-5014-03MNA
		Bolt, cylinder head cover to cylinder head/camshaft housing	*BA01.20-P-1004-01J
12	Carefully pry off the right cylinder head cover (1) from the right 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 right cylinder head cover (1) and right cylinder head. The sealing surfaces can be damaged otherwise. Replace rear connection piece.	AH01.30-P-1000-08MM
		Sealant, Loctite 5970, 50 ml	*BR00.45-Z-1013-01A
		Application gun	Fig 2
13	Remove position sensors of camshafts.	For replacing the right cylinder head cover (1) and right cylinder head (parts available only in combination). Engine 176 in model 463 up to model year 2019	AR15.12-P-2144MNF
		Engine 177 in model 205	AR15.12-P-2144MNA
14	Remove the holder for the upper engine cover on the right cylinder head cover (1).	For replacing the right cylinder head cover (1) and right cylinder head (parts available only in combination).
15	Remove the slide rail on the right cylinder head cover (1).	For replacing the right cylinder head cover (1) and right cylinder head (parts available only in combination).
16	Unscrew the bolt (5) and remove the cover (6).	For replacing the right cylinder head cover (1) and right cylinder head (parts available only in combination). Replace seal.
	Check
17	Check the camshaft mounts in the right cylinder head cover (1) and camshafts for galling and score marks. General information on checking camshafts and bearing points of camshafts	If camshaft mounts are damaged, ↓ Replace the right cylinder head cover (1) and right cylinder head (parts available only in combination).	AH05.20-P-1000-09SZ
			AR01.30-P-5780MNA
	Clean
18	Clean the sealing surfaces on the right cylinder head and right 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
19	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
20	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