18 32 050 Removing and installing/replacing catalytic converter cylinders 5-8 (S63 B44 T 0)

WARNING: Risk of burning!
Only perform this repair work on an engine that has cooled down.

Necessary preliminary tasks:

Release screws (1).

Tightening torque 18 32 3AZ .

Release screw (2).

Tightening torque 18 32 2AZ .

Remove bracket (3).

Fig 1: Identifying Bracket With Screws

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Unscrew nuts (1).

Tightening torque 18 32 4AZ .

Unfasten screws (2).

Tightening torque 18 32 3AZ .

Remove bracket (3).

Fig 2: Removing Bracket

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Release screw (1).

Tightening torque 18 32 1AZ .

Remove and renew clamp (2).

Remove catalytic converter cylinders 5-8 towards top.

Installation note:

Clamps must be installed with the screws toward the inside (Figure). Otherwise, a top heat shield can no longer be installed.

Fig 3: Identifying Catalytic Converter, Clamp And Screw

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Installation note:

The ends of the V-band clamps must rest parallel to each other.

Tightening torque 18 32 1AZ .

Fig 4: Identifying V-Band Clamps

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Installation note:

If you can see a gap between the ends of the V-band clamps, release and then repeat the screw connection.

Tightening torque 18 32 1AZ .

Fig 5: Identifying Gap Between Ends Of V-Band Clamps

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Installation note:

If the ends of the V-band clamps are positioned under each other, release and then repeat the screw connection.

Tightening torque 18 32 1AZ .

Fig 6: Locating V-Band Clamps Ends

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Assemble engine.

Check exhaust system for leaks.