18 00 020 Removing and installing complete exhaust system (N54, N54T)

Special tools required: 

• 31 2 220

Necessary preliminary tasks: 

• Remove the REINFORCEMENT PLATE from the rear axle.
• Remove TENSION STRUTS on left and right from rear axle.

Support exhaust system with special tool 31 2 220.

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

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Unscrew nuts (1).

Tightening torque 18 31 1AZ .

Installation note: 

Replace gaskets.

Replace nuts (1).

Fig 2: Identifying Nuts

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Unscrew screws (1) and (2).

Tightening torque 18 31 2AZ .

Remove retaining clip.

Fig 3: Identifying Bracket With Bolt

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

Spray bolt (1) and rubber mount with lubricant 5.2 .

Release screw (1) on rubber mount.

Tightening torque 18 31 4AZ .

Installation note: 

Risk of damage to screw and thread of the retaining plate.

Join bolt (1) exactly. If necessary, brace rear silencer with a jack.

Fig 4: Identifying Screw On Rubber Mount

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Slacken nut (1).

Tightening torque 18 31 5AZ .

Fig 5: Identifying Slacken Nut

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Pull off vacuum hose (1).

Slacken nut (2).

Tightening torque 18 31 4AZ .

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

Fig 6: Identifying Vacuum Hose

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Installation note: 

Check rubber mount for damage.

If necessary, replace damaged rubber mounts.

Check exhaust system for leak tightness.