18 00 018 Removing and installing complete exhaust system (B48, B46)

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WARNING: Danger of burning and other injuries!
This repair work may only be carried out on an exhaust system which has cooled down.
Removal of the exhaust system must be carried out with the assistance of a second person.

Necessary preliminary tasks:

Use a suitable jack to support and secure the exhaust system against falling.

Removal:

Loosen screws.

Remove cover (1).

Fig 1: Locating Cover Screws

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Release clamp (1).

Replace clamp (1).

Parts: Clamp.

Fig 2: Complete Exhaust System Clamp

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F56 only:

Loosen screws (1).

Remove connection carrier.

Fig 3: Connection Carrier Screws

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F55 only:

Loosen screws (1).

Remove front connection carrier (2).

Loosen screws (3).

Remove rear connection carrier (4).

Fig 4: Front Or Rear Connection Carrier And Screws

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Spray rubber mount (1) with lubricant and detach from exhaust system.

Replaced damaged rubber mounts.

Parts: Rubber mount

Fig 5: Exhaust System Rubber Mount

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Loosen screws (1).

Remove cross strut (2) on rear axle support.

Fig 6: Cross Strut And Screws

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Spray rubber mount (1) with lubricant and pull off from rear silencer.

Replaced damaged rubber mounts.

Parts: Rubber mount

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

Fig 7: Rear Silencer Rubber Mount

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Preparation for installation:

Check rubber mount for damage, replace if necessary.

Install exhaust system and connect to the catalytic converter with the assistance of a second person.

Tighten clamp (1).

Tightening torque 18 20 1AZ .

Fig 8: Tightening Rubber Mount Clamp

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Connect rubber mount (1) to rear silencer.

Fig 9: Rear Silencer Rubber Mount

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Connect rubber mount (1) to exhaust system.

Fig 10: Exhaust System Rubber Mount

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F56 only:

Install connection carrier.

Tighten down screws (1).

Tightening torque 18 30 4AZ .

Fig 11: Connection Carrier Screws

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Fig 12: Front Or Rear Connection Carrier And Screws

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F55 only:

Install front connection carrier (2).

Tighten down screws (1).

Tightening torque 18 30 7AZ .

Install rear connection carrier (4).

Tighten down screws (3).

Tightening torque 18 30 4AZ .

Install cross strut (2) on rear axle support.

Tighten down screws (1).

Tightening torque 33 31 2AZ .

Fig 13: Cross Strut And Screws

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Position cover (1).

Tighten the screws.

Fig 14: Locating Cover Screws

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Required follow-up work:

Check exhaust system for leak tightness.