18 00 018 Completely remove and install the exhaust system (N57 D30 O/T 1 with SCR)

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Special tools required:

31 2 220

WARNING: Risk of burning!
Only carry out this repair work when the exhaust system has cooled down.

IMPORTANT: Removal of the exhaust system must be carried out with the assistance of a second person.

Necessary preliminary work:

Switch off ignition.
Remove rear UNDERBODY PROTECTION .
F11 and F07 only:
Remove trailing link.

Support exhaust system with jack and special tool 31 2 220 or other suitable special tool and secure against falling down.

Fig 1: Supporting Exhaust System Using Special Tool (31 2 220)

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Release screws (1).

Remove cover (2).

Fig 2: Identifying Exhaust System Cover With Screws

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Unlock connector (1) and remove.

Detach cable from clamp.

Do not release the exhaust-gas temperature sensor (2).

Fig 3: Identifying Exhaust-Gas Temperature Sensor Connector

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Unscrew nuts (1).

Tightening torque 18 31 1AZ .

Fig 4: Identifying Exhaust System Nut

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Slacken nut (1).

Tightening torque 18 20 3AZ .

Fig 5: Identifying Exhaust System Nut

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OnlyF07:

Release screws (1).

Remove heat shield (2).

Fig 6: Identifying Heat Shield And Screws

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F07 only:

Release screws (1).

Tightening torque 18 31 6AZ .

Only if auxiliary heating fitted. Release screw (2) on metering pump.

Tightening torque 18 31 7AZ .

Release screws (3) on underbody panelling.

Remove reinforcement plate (4).

Fig 7: Identifying Reinforcement Plate And Screws

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F10 and F11 only:

Release screws (1).

Tightening torque 18 31 6AZ .

Only if auxiliary heating fitted. Release screw (2) on metering pump.

Tightening torque 18 31 7AZ .

Release screws (3) on underbody panelling.

Remove reinforcement plate (4).

Fig 8: Identifying Reinforcement Plate, Underbody Panelling And Metering Pump Screw

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Detach nitrogen oxide sensor (1) and remove from exhaust system.

Tightening torque 13 62 11AZ .

Fig 9: Identifying Nitrogen Oxide Sensor

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If fitted:

Detach particulate control sensor (1) and remove from exhaust system.

Tightening torque 13 62 13AZ .

Fig 10: Identifying Particulate Control Sensor

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Slacken nut (1).

Tightening torque 18 20 4AZ .

Fig 11: Identifying Exhaust System Nut

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Picture shows the left side, the procedure for the right side is identical.

Spray lubricant 5.2 onto screw (1) and rubber mount.

Release screw (1).

Lower and remove exhaust system with assistance of a second person.

Installation note:

Risk of damage to screw (1) and retaining plate thread.

Fig 12: Identifying Rubber Mount Screw

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Observe screwing sequence .

Firstly apply nut to body at rear.
Then join bolt (1) exactly and secure. If necessary support rear silencer using a suitable jack.
Tightening torque 18 20 5AZ .

N57 D30 O 1 only:

Slacken nut (1).

Tightening torque 18 20 5AZ .

Lower and remove exhaust system with assistance of a second person.

Fig 13: Identifying Exhaust System Nut

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N57 D30 T 1 only:

Picture shows the left side, the procedure for the right side is identical.

Slacken nut (1).

Tightening torque 18 20 5AZ .

Fig 14: Identifying Exhaust System Nut

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Installation note:

Check exhaust system for leaks.