Removing and installing/replacing front air duct (S55 engine)

Carry out this repair only when the engine has cooled down.

Necessary preliminary work: 

• Remove right-hand INTAKE SILENCER HOUSING .
• Remove IGNITION COIL COVER .
• Remove top rear AIR DUCT .
• Remove STIFFENING PLATE .
• Remove UNDERBODY PROTECTION .

Removal: 

Unlock connector (1) and pull off.

Release screw (2).

Release screw (3).

Carefully pull the vent hose (4) out of the air duct.

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Only ECE models: 

Release vent hose (1) on cylinder head cover.

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Release screws (1) and lay auxiliary coolant pump (2) to side.

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Release nut (1) and remove air duct (2) upwards.

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Installation: 

Install air duct (2) and tighten nut (1).

Tightening torque 13 71 3AZ .

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Tighten screws (1) for auxiliary coolant pump (2).

Tightening torque 17 10 8AZ .

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Connect and lock the connector (1).

Connector (1) must engage audibly.

Tighten screw (2).

Tightening torque 13 71 2AZ .

Carefully insert the vent hose (4) into the air duct.

Tighten screw (3).

Tightening torque 13 71 8AZ .

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Only ECE models: 

Lock vent hose (1) on cylinder head cover.

Vent hose (1) must audibly engage.

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Required follow-up work: 

• Install top rear AIR DUCT .
• Install right INTAKE FILTER HOUSING .
• Install IGNITION COIL COVER .
• Install STIFFENING PLATE .
• Install UNDERBODY PROTECTION .