Exhaust System: Service and Repair

18 00 020 Removing and installing complete exhaust system (N74)

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.





Necessary preliminary tasks:
^ Remove cover for exhaust pipe on left and right

^ F03 Only:
Remove underbody protection on left and right





Support exhaust system with special tool 31 2 220.





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 and seals.





Release screws (1).

Tightening torque 18 20 2AZ.

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

Tightening torque 18 20 3AZ.

Release screws (3) on underbody panels.

Remove reinforcement plate (4).





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

Release exhaust system from rubber mount (1).

Check rubber mount for damage. Replaced damaged rubber mounts.





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

Unscrew nuts (1).

Tightening torque 18 20 1AZ.





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

Detach hose (1) on vacuum unit.

Slacken nut (2).

Tightening torque 18 20 1AZ.

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.