Remove left cylinder head

WARNING: Hot surfaces .
Risk of burning!

Perform all work only on components that have cooled down.

WARNING: Vehicle may slip off the vehicle hoist if the vehicle hoist is handled incorrectly .
Danger! Immobilization period-threatening injuries!

Observe safety instructions on raising the vehicle using a vehicle hoist.
For additional information see: RAISING THE VEHICLE WITH A VEHICLE LIFT .

Preliminary work

Refer to SUCTIONING THE AIR CONDITIONING .
Refer to REMOVING LUGGAGE COMPARTMENT FLOOR COVERING .
Refer to REMOVING THE LOADING EDGE TRIM .
Refer to REMOVING TRUNK COMPARTMENT LIGHT .
Refer to REMOVING THE UPPER LUGGAGE COMPARTMENT TRIM PANELS .
Refer to PARTIALLY REMOVING LEFT AND RIGHT LUGGAGE COMPARTMENT WHEEL ARCH TRIM PANEL .
Refer to REMOVING THE COVER FOR THE WATER CHANNEL LEFT AND RIGHT .
Refer to REMOVING THE TAIL LIGHT ON THE LEFT AND RIGHT SIDE PANEL .
Refer to REMOVING THE UNDERBODY PLANKING OF THE TRANSMISSION ON THE SIDE .
Refer to REMOVING THE CONNECTING SUPPORT FROM THE TUNNEL .
Refer to REMOVING THE TORSION STRUT ON THE REAR LEFT AND RIGHT .
Refer to IF INSTALLED: REMOVING THE REAR AXLE COVER .
Refer to REMOVING THE REAR DIFFUSER .
Refer to REMOVING REAR BUMPER TRIM .
Refer to REMOVING BOTH EXHAUST COVERS .
Refer to REMOVING REAR BUMPER PANEL .
Refer to REMOVING EXHAUST SYSTEM .
Refer to REMOVING THE RETAINING BRIDGE .
Refer to REMOVING THE RETAINING BRIDGE IN VEHICLES WITH A GASOLINE PARTICULATE FILTER .
Refer to PARTIALLY REMOVING THE LEFT LAMBDA OXYGEN SENSOR .
Refer to PARTIALLY REMOVING THE LAMBDA OXYGEN SENSOR .
Refer to REMOVING THE LEFT OXYGEN SENSOR MONITOR .
Refer to REMOVING THE RIGHT OXYGEN SENSOR MONITOR .
Refer to REMOVING UPPER HEAT SHIELD .
Refer to REMOVING THE LEFT HEAT SHIELD .
Refer to REMOVING RIGHT HEAT SHIELD .
Refer to REMOVING THE COVER OF THE ENGINE COMPARTMENT AT THE REAR LEFT .
Refer to REMOVING THE COVER OF THE REAR RIGHT ENGINE COMPARTMENT .
Refer to REMOVING LEFT AND RIGHT WIPER ARM .
Refer to REMOVING WINDSHIELD PANEL COVER .
Refer to REMOVING TRAILING LINK AT SPRING BOLT .
Refer to REMOVING THE COWL UPPER PART IN THE CENTER .
Refer to LIFTING THE HEAT SHIELD .
Refer to REMOVING THE CATALYTIC CONVERTER FOR CYLINDERS 5 TO 8 .
Refer to REMOVING THE CENTER ENGINE COMPARTMENT COVER .
Refer to REMOVING BOTH FRONT-END STRUTS .
Refer to REMOVING UPPER CROSS CONNECTION .
Refer to REMOVING THE REAR TOP CROSS CONNECTION .
Refer to REMOVING FAN COWL .
Refer to REMOVING DRIVE BELT .
Refer to RELEASING LEFT CHARGE AIR LINE PARTIALLY .
Refer to PARTIALLY RELEASING THE RIGHT CHARGE AIR LINE .
Refer to REMOVING THE FRONT BOTTOM SIDE COVER .
Refer to REMOVING THE FRONT BOTTOM SIDE COVER .
Refer to REMOVING THE RIGHT HAND FRONT BOTTOM SIDE COVER .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to REMOVING THE FRONT THRUST FIELD .
Refer to DRAINING COOLANT .
Refer to REMOVING THE COOLANT PUMP .
Refer to DRAINING THE COOLANT FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
Refer to REMOVING THE COOLANT EXPANSION TANK FOR THE LOW-TEMPERATURE COOLANT CIRCUIT (CHARGE AIR COOLER) .
Refer to REMOVING BOTH CHARGE AIR COOLERS .
Refer to REMOVING THE CLEAN AIR PIPE OF CYLINDER BANK 1 .
Refer to REMOVING THE CLEAN AIR PIPE OF CYLINDER BANK 2 .
Refer to REMOVING THE IGNITION COILS OF CYLINDERS 1 AND 5 .
Refer to REMOVING IGNITION COIL OF CYLINDER BANK 2 .
Refer to REMOVING FUEL DELIVERY LINE .
Refer to REMOVING LEFT HIGH PRESSURE PUMP .
Refer to REMOVING THE HIGH-PRESSURE RAIL ON THE LEFT .
Refer to REMOVING THE INJECTORS FOR CYLINDERS 5 TO 8 .
Refer to REMOVING VANOS SOLENOID ACTUATOR, EXHAUST OF CYLINDER BANK 2 .
Refer to REMOVING VANOS SOLENOID ACTUATOR, INTAKE OF CYLINDER BANK 2 .
Refer to REMOVING THE LEFT AND RIGHT EXHAUST TURBOCHARGER .
Refer to REMOVING FRONT HEAT SHIELD .
Refer to REMOVING THE OIL FEED LINE AT THE EXHAUST TURBOCHARGER FOR CYLINDERS 5 TO 8 .
Refer to REMOVING LEFT CYLINDER HEAD COVER .
Refer to REMOVING THE PRESSURE LINE BETWEEN THE EVAPORATOR AND THE AIR CONDITIONING CONDENSER .
Refer to REMOVING THE TIMING CASE COVER FROM THE CYLINDER HEAD OF CYLINDER BANK 2 .
Refer to MOVING THE CRANKSHAFT TO THE INSTALLATION POSITION TO ADJUST THE TIMINGS .
Refer to CHECKING THE VANOS ADJUSTER OF CYLINDER BANK 2 .
Refer to RELAXING CHAIN TENSIONER ON BANK 2 FOR CHECKING OR SETTING TIMING .
Refer to REMOVING HYDRAULIC CHAIN TENSIONER OF CYLINDER BANK 2 .
Refer to PRELOADING THE TIMING CHAIN OF CYLINDER BANK 2 .
Refer to FIXING THE ENGINE IN THE INSTALLATION POSITION ON CYLINDER 1 (SET VALVE TIMINGS) .
Refer to REMOVING BOTH LEFT VANOS ADJUSTERS .
Refer to REMOVING SPECIAL TOOL FOR FIXING CAMSHAFTS IN POSITION ON BANK 2 .
Refer to REMOVING SPECIAL TOOL TO PRETENSION TIMING CHAIN ON CYLINDER BANK 2 .

CAUTION: Heavy component .
Heavy components can lead to injury or damage .

Remove and install heavy components with the aid of another person/other persons.

NOTE: RISK OF DAMAGE
Damage to guide rails .
The application of great force can damage the guide rails of the timing chain .

When removing and installing the cylinder head, make sure that the cylinder head does not damage the guide rail.

Prepare the special tool 0 494 116 (11 8 352) from the set of special tools 0 493 997 (11 8 350) in a vice.
Mark the special tool 0 494 116 (11 8 352) in the area (A).
(A) = 50 mm
Set a punch in the center of the marked area.
Drill a hole with a 8.5 mm drill.

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NOTE:
RISK OF DAMAGE
Improper screw length can cause component damage .
The use of screws of improper length can lead to component damage .
- Note the correct screw length.
- Install screws that correspond to the original length.
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Tighten the special tool 0 494 116 (11 8 352) from the set of special tools 0 493 997 (11 8 350) on the cylinder head with standard M8screws (1) .

TIGHTENING TORQUE SPECIFICATIONS

Special tool to cylinder head bank 2
M8 screw	tightening torque	25 Nm

Loosen hose clamp (1) .
Detach the coolant hose from the left cylinder head.

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NOTE: To provide a better overview: Schematic diagram with partially hidden components.
Release the wiring harness mountings (1) below the intake system.

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Unlock and disconnect the plug connection (1) on the throttle valve.

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Unlock and disconnect the quick-release coupling (1) .

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Unlock the connector (1) and detach from the servomotor.
Unlock the connector (2) and detach from pressure sensor on intake plenum.

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Feed out the coolant hose (1) and set it aside.

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Loosen screws (1) .
Remove the heat shield (2) at rear on the cylinder head.

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Release the screws (1) the timing case cover.

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Release the screw of the slide rail on the cylinder head of cylinder bank (1) .

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Loosen screws (1) to (10) .

Fig 1: Cylinder Head Screws Loosening Sequence
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Twist the camshaft (2) to remove the cylinder head bolt (1) on cylinder 5 with a standard open-end wrench (3) on the hexagon head.

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NOTE: TECHNICAL INFORMATION
The work must be performed with vehicle care to prevent component damage.
Attach the special tool 0 490 561 (11 0 000) on the retaining tab (1) and on the special tool 0 494 116 (11 8 352) from the set of special tools 0 493 997 (11 8 350) .
NOTE: TECHNICAL INFORMATION
The work must be performed with vehicle care to prevent component damage.

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Mind the free movement of the tensioning rails and slide rails .
Risk of breakage!
Carefully lift the cylinder head using a workshop crane.
Carefully feed out and remove the cylinder head with a workshop crane and 3 support persons.
Remove cylinder head gasket (1) .

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