18 00 020 Removing and installing complete exhaust system (N54)

Special tools required:

WARNING:

Scalding hazard. Only perform these tasks after exhaust system has cooled down.

Risk of injury. Removal of the exhaust system must be carried out with the assistance of a second person.

Support exhaust system with special tool 31 2 220.

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

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Unscrew nuts (1).

Replace self-locking nut.

Tightening torque 18 31 1AZ .

Replace seals.

Fig 2: Identifying Nuts

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Slacken nut (1).

Tightening torque 18 20 3AZ .

Fig 3: Identifying Nut

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

Slacken nut (1).

Tightening torque 18 31 4AZ .

Fig 4: Identifying Nut

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Release screws (1).

Tightening torque 18 31 6AZ .

Only when independent heating is fitted: release screw (2) on metering pump.

Tightening torque 18 31 7AZ .

Release screws (3) on underbody panels.

Remove reinforcement plate (4).

Fig 5: Identifying Reinforcement Plate And Screws

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

Slacken nut (1).

Tightening torque 18 31 5AZ .

Fig 6: Identifying Left Side Nuts

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Slacken nut (1).

Tightening torque 18 31 5AZ .

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

Fig 7: Identifying Nut

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Installation:

Check rubber mount for damage.

If necessary, replace damaged rubber mounts.

Check exhaust system for leaks.