Exhaust System: Service and Repair

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

Special tools required:





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.





Support exhaust system with special tool 31 2 220.





Unscrew nuts (1).

Replace self-locking nut.

Tightening torque 18 31 1AZ.

Replace seals.





Slacken nut (1).

Tightening torque 18 20 3AZ.





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

Slacken nut (1).

Tightening torque 18 31 4AZ.





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).





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

Slacken nut (1).

Tightening torque 18 31 5AZ.





Slacken nut (1).

Tightening torque 18 31 5AZ.

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





Installation:
Check rubber mount for damage.

If necessary, replace damaged rubber mounts.

Check exhaust system for leaks.