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Home >> Mercedes Benz >> 2025 >> S580 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Complete Engine (1 Of 2) -- 223 Chassis >> Testing & Repair >> Remove/Install Cylinder Head Cover >> Remove/Install Left Cylinder Head Cover - AR01.20-P-5013SVZ

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

Engine 279 in model 223 

G16189465Courtesy of MERCEDES-BENZ USA
G16189466Courtesy of MERCEDES-BENZ USA
CAUTION 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 threaded connections fastened using a tightening angle-based tightening process   AH00.00-P-0020-01A
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Notice  Notes on threaded connections with aluminum screws/bolts   AH00.00-P-0006-01RM
REMOVINGINSTALLING Remove/install     
1 Remove left charge air cooler.   AR09.41-P-6827SVZ
2 Remove left ignition coils.   AR15.12-P-2008SVZ
3 Remove screw (3) and place vacuum line (6) to one side.    
4 Remove vacuum line (4) and place to one side.    
5 Remove bleed line (2) and place to one side.    
6 Remove screw (5).    
7 Remove electrical wiring harness (10) from cylinder head cover (14) and place to one side. INSTALLATION IMPORTANT Replace cable tie.  
8 Remove vacuum line (11) from cylinder head cover (14) and place to one side. INSTALLATION IMPORTANT Replace cable tie.  
9 Remove low-temperature circuit expansion reservoir.   AR09.41-P-0001SVZ
10 Remove screws (8, 9, 15).    
11 Remove coolant pipe (7). SPECIAL TOOL Hose clamp pliers Fig 1
12 Remove coolant pipe (12) and place to one side with connected lines. INSTALLATION IMPORTANT Install new sealing rings.
TORQUE SPECIFICATION Screw/bolt, coolant pipe to coolant thermostat
*BA20.10-P-1005-01H 
    TORQUE SPECIFICATION Screw/bolt, coolant pipe to cover on the left *BA20.10-P-1006-01H 
13 Remove pressure regulating valve (1).   AR01.20-P-2100SVZ 
14 Unscrew screws (13) in reverse order of tightening procedure and remove cylinder head cover (14).    
REFER TO BASIC KNOWLEDGE Tightening procedure for left cylinder head cover INSTALLATION IMPORTANT Ensure that cylinder head cover gasket is seated correctly.
INSTALLATION IMPORTANT Replace screws (13) and cylinder head cover gasket.
GF01.20-P-5013-01SVZ 
    TORQUE SPECIFICATION Screw/bolt, cylinder head cover to cylinder head *BA01.20-P-1001-01T 
15 Install in the reverse order.    
INSPECT Check     
16
REFER TO MAINTENANCE
Check, correct engine oil level.   AP18.00-P-1812A
WARNING Risk of burn injuries  , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning  caused by skin contact with solid components of the exhaust. Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area. AS49.00-Z-0001-01A
WARNING 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
17 Carry out engine test run and check engine for leak tightness.    
CRANKCASE VENTILATION SYSTEM, CYLINDER HEAD COVER

Number Designation Engine 279
BA01.20-P-1001-01T Screw/bolt, cylinder head cover to cylinder head Stage 1 Nm 4
Stage 2 ∠° 120
COOLANT PUMP, COOLANT THERMOSTAT

Number Designation Engine 279
BA20.10-P-1005-01H Screw/bolt, coolant pipe to coolant thermostat Nm 9
COOLANT PUMP, COOLANT THERMOSTAT

Number Designation Engine 279
BA20.10-P-1006-01H Screw/bolt, coolant pipe to cover on the left Nm 9
Fig 1: Identifying Hose Clamp Pliers (454 589 00 37 00)
G16163101Courtesy of MERCEDES-BENZ USA