Audi A4 Owners & Service Manuals

Audi A4: Windshield Antenna Suppression Filter -C18-, Removing and Installing

Audi A4 (B9) 2016-2024 Service Manual / Electrical System / Communication / Antenna Systems / Windshield Antenna Suppression Filter -C18-, Removing and Installing

Windshield Antenna Suppression Filter -C18-, Removing and Installing, Sedan

The Windshield Antenna Suppression Filter -C18- is located behind the left D-pillar trim panel at the center of the D-pillar.

Removing

- Turn off the ignition and all electrical equipment and remove the ignition key.

- Remove the left D-pillar trim panel. Refer to → Body Interior; Rep. Gr.70; Vehicle Interior Trim Panels; D-Pillar Trim Panel, Removing and Installing.

- Remove the nuts -3 and 5- on the Windshield Antenna Suppression Filter -C18--1-.

- Disconnect the wires -2 and 6- on the Windshield Antenna Suppression Filter -C18--1-.

- Remove the nut -4- and then remove the Windshield Antenna Suppression Filter -C18--1- from the D-pillar.

A91-12160

Installing

- Install in reverse order of removal. Note the following:

Tightening Specifications

  • Refer to → Chapter "Component Location Overview - Antenna Systems, Sedan, USA"
  • Refer to → Chapter "Component Location Overview - Antenna Systems, Sedan, Europe and Rest of World"

Windshield Antenna Suppression Filter -C18-, Removing and Installing, Avant

The Windshield Antenna Suppression Filter -C18- is located in the left front of the luggage compartment behind the luggage compartment side trim panel.

Removing

- Turn off the ignition and all electrical equipment and remove the ignition key.

- Remove the left luggage compartment side trim panel. Refer to → Body Interior; Rep. Gr.70; Luggage Compartment Trim Panels; Luggage Compartment Side Trim Panel, Removing and Installing.

- Remove the nuts -2 and 4- on the Windshield Antenna Suppression Filter -C18--1-.

- Disconnect the wires on the Windshield Antenna Suppression Filter -C18--1-.

- Remove the nut -3- and the Windshield Antenna Suppression Filter -C18--1-.

A91-12575

Installing

- Install in reverse order of removal. Note the following:

Tightening Specifications

  • Refer to → Chapter "Component Location Overview - Antenna Systems, Avant, USA"
  • Refer to → Chapter "Component Location Overview - Antenna Systems, Avant, Europe and Rest of World"

Traffic Data Antenna, Removing and Installing

The Traffic Data Antenna -R173- is located at the top of the windshield on the left side (only ER5).

Removing

- Turn off the ignition and all electrical equipment and remove the ignition key.

The connectors -2- for the Traffic Data Antenna -R173--1- are located on the roof crossmember, behind the left sun visor. The flat band cable -2- is routed on the roof crossmember.

- Disconnect the connector -2-.

Traffic Data Antenna -R173- removal:

A91-12392

A safety piece -2- secures the Traffic Data Antenna -R173--1- to its bracket -3-. The bracket is glued to the windshield -3-.

A91-11791

- Remove the safety piece -2- with a small screwdriver.

- Remove the Traffic Data Antenna -R173--1- from the bracket -3-.

A91-11791

Installing

- Installation is identical in reverse order of removal.

Close Range Communication Antenna, Removing and Installing

The Close Range Communication Antenna -R269- is located in the center of the front instrument panel (only ER5).

Removing

- Turn off the ignition and all electrical equipment and remove the ignition key.

- Remove the center defroster vent with the speaker trim. Refer to → Body Interior; Rep. Gr.70; Instrument Panel; Center Front Defroster Vent, Removing and Installing.

- Release the retainers -1-.

- Tilt the Close Range Communication Antenna -R269--2- out of the retainer in the instrument panel.

- Release and disconnect the connector -3-.

A91-12591

Installing

- Installation is identical in reverse order of removal.

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