Replacing Center Muffler

18 12 050 Replacing center silencer (N55)





Special tools required:
^ 31 2 220





Warning!
Risk of burns!
Only perform these tasks after exhaust system has cooled down.

Support center silencer with special tool 31 2 220 and a suitable universal lifter.








Release screws (1).

Tightening torque 18 31 4AZ.

Only when auxiliary heater is fitted: release screw (2) on metering pump.

Tightening torque 18 31 5AZ.

Release screws (3) on underbody panelling.

Remove reinforcement plate (4).





Note:
If the separation point is not marked by a punch mark in the pipe, determine the separation point by means of the pipe length on the new center silencer.

Carry over separation point to faulty center silencer and mark.

Secure center silencer against falling off.

Cut through exhaust pipes at marked point with a suitable tool.





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

Slacken nut (1).

Tightening torque 18 20 3AZ.





Installation note:
Adjust center silencer to fit and connect with clamps.

Center clamp and tighten down.

Tightening torque 18 31 7AZ.

The procedure is identical on both sides.





Note:
Check exhaust system for leaks.