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Remove/install right cylinder head cover - AR01.20-P-5012ELB

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ENGINES 157, 278 in MODEL 212, 218 

ENGINES 278 in MODEL 207 

Fig 1: Right Cylinder Head Cover Remove/Install Components (1 Of 2)
G09973766Courtesy of MERCEDES-BENZ USA
Fig 2: Right Cylinder Head Cover Remove/Install Components (2 Of 2)
G09973767Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
NOTES Notes on threaded connections with aluminum screws   AH00.00-P-0006-01RM
1 Remove rail   AR07.03-P-1010ELB
2 Remove ignition coils Model 207 AR15.12-P-2003FH
    Model 212, 218 AR15.12-P-2003EL
3 Detach engine wiring harness on cylinder head cover (1)   AR01.00-P-2410-02ELB
4 Detach oil line for turbocharger on cylinder head cover (1) and place to one side   AR18.30-P-6850ELB
5 Remove front cover at cylinder head (2)   AR01.30-P-5700ELB
6 Remove centrifuge (3)   AR01.20-P-2100ELB 
7 Remove lifting eye (4) on cylinder head cover (1)    
8 Remove housing (5) for high-pressure pumps   AR07.02-P-1020ELB
9 Loosen bolts (1s) for cylinder head cover (1) in the reverse order of the tightening procedure and remove them INSTALLATION IMPORTANT Replace bolts (1s). AR01.20-P-5014-03MMB
    TORQUE SPECIFICATION *BA01.20-P-1004-01L 
10 Carefully pry off cylinder head cover (1) from cylinder head (2) NOTES Do not  hammer in a tool to pry off between cylinder head cover (1) and cylinder head (2). The sealing surfaces will be damaged otherwise.  
    INSTALLATION IMPORTANT Apply sealant to cylinder head cover (1): ↓  
IMPORTANT   Observe notes on sealant path for cylinder head cover (1). AH01.30-P-1000-08MM
    SPECIAL TOOL Fig 3
    Loctite 5970 sealant *BR00.45-Z-1013-01A 
INSPECT Checking     
11 Check camshaft mounts in cylinder head cover (1) and camshafts for galling and score marks    
CLEANING Clean     
12 Clean sealing surfaces at cylinder head (2) and cylinder head cover (1) NOTES Do not use any sharp-edged tools or abrasive paper. The sealing surfaces will be damaged otherwise. AR01.00-P-0050-01A
    Loctite 7200 *BR00.45-Z-1038-04A 
    Loctite 7063 cleaning spray (150 ml) *BR00.45-Z-1046-04A 
13 Install in the reverse order    
DANGER 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
14 Conduct engine test run and check engine for leaks while it is running    
CRANKCASE VENTILATION, CYLINDER HEAD COVER

Number Designation Engine 157 Engine 278
BA01.20-P-1004-01L Bolt, cylinder head cover to cylinder head Stage 1 Nm 12 12
Stage 2 ∠° 90 90
Fig 3: Identifying Squeeze Gun (112 589 00 25 00)
G09973768Courtesy of MERCEDES-BENZ USA
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1013-01A Loctite 5970 sealant A 003 989 98 20
BR00.45-Z-1038-04A Loctite 7200 Henkel Loctite Deutschland GmbH
BR00.45-Z-1046-04A Loctite 7063 cleaning spray (150 ml) A 001 986 71 71 10