Audi A4: Roof Molding/Roof Railing

Overview - Roof Railing

1 -  Nut

• Quantity: 4
• Insert with locking fluid. Refer to the Parts Catalog.
• Tightening specification and sequence. Refer to → Fig. "Roof Railing - Tightening Specification and Sequence".

2 -  O-Ring

• Replace if damaged

3 -  Lifter

• 0.5 Nm
• Quantity: 4
• Removing and installing. Refer to → Chapter "Lifter, Removing and Installing".
• Install with locking compound. Refer to the Parts Catalog for the locking compound.

4 -  Seal

5 -  Roof Railing

• Removing and installing. Refer to → Chapter "Roof Railing, Removing and Installing".

6 -  Seal

• Quantity: 3

Roof Railing - Tightening Specification and Sequence

- Tighten the nuts to 10 Nm in the sequence -2, 3, 4 and 1-.

Roof Railing, Removing and Installing

Special tools and workshop equipment required

• Body Socket -T40078-
• Locking fluid. Refer to the Parts Catalog.

• Follow the safety precautions. Refer to → Body Interior; Rep. Gr.00; Safety Precautions; Safety Precautions when Working on Pyrotechnic Components.

Removing

  CAUTION

Pyrotechnic components may deploy unintentionally.

Risk of injury.

- Discharge static electricity by briefly touching the door striker.

- Remove the head curtain airbag igniter from the body. The head curtain airbag remains installed. Refer to → Body Interior; Rep. Gr.69; Head Curtain Airbags; Head Curtain Airbag with Igniter, Removing and Installing.

- Remove the nuts -arrow- using the -T40078-.

- Remove the roof railing upward.

Installing

Install in reverse order of removal and note the following:

- Clean the threaded pin threads on the roof railing with a wire brush.

- Check the seal for damage.

- Carefully remove any remaining locking fluid from the nut threads that are installed with locking fluid using a thread tap. Otherwise the threaded pins could lock up when installed and break off when removed again.

- Insert the roof railing with the guide pin into the mount on the vehicle roof.

- Install the nuts with locking fluid and tighten.

Tightening Specifications

• Refer to → Fig. "Roof Railing - Tightening Specification and Sequence"

Lifter, Removing and Installing

Special tools and workshop equipment required

• Socket - Torx T50 -T10470-

  Caution

This procedure contains mandatory replaceable parts. Refer to component overview and parts catalog prior to starting procedure.

Mandatory Replacement Parts

• O-ring - Nut to Lifter

Removing

- Remove the roof railing. Refer to → Chapter "Roof Railing, Removing and Installing".

- Turn the adjusting screw in the lifter -1- several turns using the -T10470- by counterholding with a screwdriver -2-.

- Remove the lifter from the roof opening in the direction of -arrow-.

Installing

Install in reverse order of removal and note the following:

- Clean the adjusting screw threads -3- with a wire brush.

- Remove any residual locking fluid from the threaded hole of the lifter -1- using a thread tap.

- Check the stop washer -2- for damage and replace the lifter, if necessary.

• The stop washer must sit in the groove -arrow-.

- Install the adjusting screw with locking fluid in the lifter.

- Insert the lifter into the roof opening and secure it with the adjusting screw.

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