Install guide

Section 4 Bluetooth Telephone Module

This section will describe how to install an OEM Audi Bluetooth telephone module in vehicles that are

equipped with analog telephone preparation wiring. This analog telephone preparation consists of the

handsfree microphone near the sunroof dial, and the wiring harness that ends in the trunk with a

DB25 female connector. If the vehicle is equipped with the BOSE audio system, there will also be a

small telephone audio speaker in the middle portion of the B-pillar trim. This small speaker will not

be used with the RNS-E audio system. If the vehicle is actually equipped with the full analog

telephone kit, there will also be a handset in the armrest and a telephone transceiver in the trunk.

These two items can be removed from the vehicle if present.

This installation requires the presence of the telephone connections within the

RNS-E PNP Harness (TEL Mute, TEL NF IN+, TEL NF IN-). See Section 1.3.2 for detail.

Reminder: this document is specific to vehicles originally equipped with Symphony I radios. Vehicles with

Symphony II radios were equipped with newer telephone transceiver modules located under the passenger’s seat

instead of in the trunk. This type of module uses a 42-pin connector instead of a DB25 connector. The wiring in

this section does not apply to vehicles equipped with the newer telephone transceiver modules.

4.1 Custom Wiring Harness

Almost every connection required of the

new BT telephone module is already

present in the female DB25 connector in

the trunk. In this subsection, a custom

wiring harness will be made to allow the

new BT module to plug into this

connector.

The DB25 connector is tucked up behind

the toolkit on the left side of the trunk,

similar to the location of the CD changer

plug. If the analog transceiver box was

installed in the vehicle, the DB25

connector will be liberated once the

existing transceiver is removed. There

will also be an antenna connection

bundled with this connector. This

antenna will not be used in this

installation.