Removing the intake plenum

Preliminary work 

• Refer to MOVING THE HOOD TO THE SERVICE POSITION .
• Refer to DEACTIVATING THE 48 V ELECTRICAL SYSTEM .
• Refer to DEACTIVATING VEHICLE-SPECIFIC HIGH-VOLTAGE OR LOW-VOLTAGE VEHICLE ELECTRICAL SYSTEM .
• Refer to REMOVING THE ACOUSTIC COVER .
• Refer to REMOVING ACOUSTIC COVER AT REAR .
• Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
• Refer to REMOVING THE STIFFENING PLATE .
• Refer to REMOVING THE COVER OF THE STEERING ASSEMBLY .
• Refer to DRAINING THE COOLANT FROM THE LOW-TEMPERATURE COOLING SYSTEM .
• Refer to CONNECTING THE COOLANT LINE TO THE AUXILIARY COOLANT PUMP .
• Refer to REMOVING LOW-TEMPERATURE COOLANT EXPANSION TANK .
• Refer to REMOVING TANK VENT VALVE .

• Loosen screw (1).
• Feed out and remove the tank vent line (2).

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• Unlock and release the plug connections (1).
• Unlock the locks (2).
• Guide tank ventilation line (3) out of clamp (4) and remove it.

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

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• Unlock the locks (1).
• Guide out the wiring harness section (2) for the sensor system 2 and set it aside.

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• Loosen screws (1).
• Feed out charge air line (2) and place to one side.

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• Unlock plug connection (1) and disconnect.
• Loosen clamp (2).
• Thread off coolant line (3) and place to the side.

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• Release cover (1).

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• Release nut (1).
• Pull the positive battery cable (2) out and set it aside.

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• Loosen screw (1).
• Loosen clamp (2).
• Pull the positive battery cable (3) out and set it aside.

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• Unlock the locks (arrows).
• Feed out the wiring harness section (1) for the injectors and ignition coils and put to one side.

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• Loosen clamp (1).
• Pull the positive battery cable (2) out and set it aside.

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• Unlock and release plug connection (1).

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• Guide tank ventilation line (1) out of clamp (2) and place it aside.

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• Feed out the wiring harness section (1) for the injectors and ignition coils from the cylinder head cover (2) and put to one side.

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• Loosen screw (1).

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• Unlock and loosen coolant line (1).
• Catch and dispose of escaping coolant.

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• Unlock and loosen coolant line (1).
• Catch and dispose of escaping coolant.

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• Unlock and loosen coolant line (1).
• Catch and dispose of escaping coolant.

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• Release screws in the sequence (7) to (1) on the intake plenum (A).
  Fig 1: Intake Plenum Screws Loosening Sequence

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  NOTE: RISK OF DAMAGE 
  Coolant leaking from the starter motor generator. 
  Damage and loss of function of the starter motor generator. 

  • Cover the starter motor generator with suitable, watertight auxiliary materials.
  • Close off line connections with seal plugs.
  • If necessary: Rinse off the coolant leaking from starter motor generator with at least 1 l of water.

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• Slightly lift the intake plenum (1).
• Collect and dispose of escaping coolant at the openings (2) on the intake plenum (1).
  NOTE: TECHNICAL INFORMATION 
  Conduct the following operation with the assistance of a second person.
• Loosen clamp (1).
• Guide out the intake plenum (2) and remove it.

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• Empty the remaining coolant (2) from the intake plenum (1).

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  NOTE: TECHNICAL INFORMATION 
  The tension rod screws and mounting bolts from the connecting neck on the intake plenum are not  allowed to be opened.
• Do not  release screws in the marked area  on the intake plenum (1).

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