18 00 020 Removing and installing complete exhaust system (N63)

Special tools required:

31 2 220

WARNING: Scalding hazard!
Only perform this work after engine has cooled down.
Risk of injury!
Removal of the exhaust system must be carried out with the assistance of a second person.

Necessary preliminary tasks

Remove rear UNDERBODY PROTECTION .

Support exhaust system with special tool 31 2 220.

Fig 1: Support Exhaust System Using Special Tool 31 2 220

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

Unscrew nuts (1).

Tightening torque 18 31 1AZ .

Replace self-locking nuts.

Replace seals.

Fig 2: Identifying Self-Locking Nuts

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

Unscrew nuts (1).

Tightening torque 18 20 1AZ .

Fig 3: Identifying Nuts

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Release screws (1).

Tightening torque 18 20 6AZ .

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

Tightening torque 18 20 7AZ .

Release screws (3) on underbody panels.

Remove reinforcement plate (4).

Fig 4: Identifying Metering Pump Release Screw, Underbody Panel Screws And Reinforcement Plate

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

Slacken nut (1).

Tightening torque 18 20 4AZ .

Fig 5: Identifying Exhaust System Mounting Nut

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

Unscrew nuts (1).

Tightening torque 18 20 5AZ .

Fig 6: Identifying Bracket Mounting Nut

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

Slacken nut (1).

Tightening torque 18 20 5AZ .

Detach hose (2) on vacuum unit.

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

Fig 7: Identifying Vacuum Unit Hose And Nut

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Installation:

Check rubber mount for damage.

If necessary, replace damaged rubber mounts.

Check exhaust system for leaks.