Removing the cylinder head cover

WARNING: Hot surfaces.
Risk of burning!

Perform all work only on components that have cooled down.

WARNING: Working on 12 V electrical system.
Risk of short circuits! Risk of fire!

Make sure that there is no charger connected to the jump start terminal in the engine compartment.
Detach battery ground lead from battery.
For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.

WARNING: Working on fuel system.
Risk of fire! Danger of explosion!

When working on the fuel system, make sure the workstation has sufficient ventilation, e.g., by means of extraction.
Tightly seal off open lines and connections; collect any leakage fuel directly at the point of exit.
No fire, sparks, open flames or smoking.

CAUTION: On releasing high pressure line, fuel may emerge at high speed.
Injury hazard!

Wear suitable personal protective equipment.
Before performing any installation work, allow cooling system to cool down to less than 40°C.
Note warnings on cylinder head cover.

NOTE: RISK OF DAMAGE
Damage to battery terminal, the safety battery terminal or the intelligent battery sensor (IBS).
Damaged battery terminals can lead to malfunctions or vehicle electrical system faults.

Detach battery terminal from battery pole by carefully shifting to and fro. Do not pry off using a tool.

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Preliminary work

Refer to BRINGING FRONT COMPARTMENT LID IN THE SERVICE POSITION .
Refer to DEACTIVATING THE 48 V ELECTRICAL SYSTEM .
Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to REMOVING THE SEAL FOR THE HOOD REAR .
Refer to REMOVING THE ACOUSTIC COVER .
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 THE CENTER COWL UPPER PART .
Refer to REMOVING ACOUSTIC COVER AT REAR .
Refer to REMOVING THE CENTER BULKHEAD LOWER PART .
Refer to REMOVING BOTH ACTUATORS .
Refer to REMOVING SEAL FOR FRONT HOOD .
Refer to REMOVING THE COVER FOR THE CENTER ENGINE COMPARTMENT .
Refer to IF INSTALLED: PARTIALLY REMOVING THE TOP RIGHT AND LEFT COVER IN THE ENGINE COMPARTMENT .
Refer to REMOVING UPPER CROSS CONNECTION .
Refer to REMOVING THE REAR TOP CROSS CONNECTION .
Refer to REMOVING THE FAN COWL .
Refer to REMOVING ALL IGNITION COILS .
Refer to REMOVING THE HIGH PRESSURE LINE BETWEEN THE HIGH PRESSURE PUMP AND THE RAIL .
Refer to REMOVING FUEL DELIVERY LINE .
Refer to REMOVING HIGH PRESSURE PUMP .
Refer to REMOVING THE RAIL WITH INJECTORS OF CYLINDERS 1 TO 3 .
Refer to REMOVING THE RAIL WITH INJECTORS OF CYLINDERS 4 TO 6 .

Bolts of the cylinder head cover

Fig 1: Cylinder Head Cover Bolts Loosening Sequence

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1 Bolts of the cylinder head cover

A Cylinder head cover 21

NOTE: RISK OF DAMAGE
Damage to wires when disconnecting connectors and plug connections.
Sheared wires can cause a short circuit.

Do not pull on wires when disconnecting connectors and plug connections.

Unlock the locks (1) .
Feed the engine ventilation line (2) out and set it aside.

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Loosen nut (1) .
Feed out ground cable (2) and set it aside.
Loosen screws (3) .
Thread out holder (4) and set aside.

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Unlock and detach the locks (arrows).
Feed out the wiring harness section (1) for the sensor system 2 and put it aside.

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Unlock and release the connector (1) at the exhaust camshaft sensor.
Loosen clamp (2) .

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If installed:
Unlock and loosen connector (1) .
Loosen screw (2) .
Remove the differential pressure sensor (3) and put it to one side.

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Loosen screws (1) .
Feed out the bracket (2) of the positive battery cable and set it aside.

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Loosen clamps (1) .

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Loosen clamp (1) .
Feed out the wiring harness section (2) for the injectors and ignition coils and set aside.

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Unlock and release the connector (1) on the intake camshaft sensor.
Loosen clamps (2) .

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Loosen clamps (1) .

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Loosen all the screws (21) to (1) on the cylinder head cover (A) in sequence.

Fig 2: Cylinder Head Cover Screws Loosening Sequence
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Feed out and remove the cylinder head cover (1) .

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