Setup via Wi-Fi


When first commissioning, the BT Changer module must be set up for the car. After new installation as well as updates, the warning message ‘Please Setup’ will appear on the SID. The settings must be done in WIFI mode.


The settings of the BT Changer module can be done via WiFi AP connection. This means that no internet connection is needed for the connection; the head unit and the BT Changer module communicate with each other over the WiFi protocol. Depending on the head unit, pressing the “6” CD button or holding down the SEEK back button for a long time will switch the module to WiFi mode. (For NG 9-3, you can see the steps to enter WiFi mode in this video.)
The “WiFi Mode!” message will appear on the SID or the head unit display. On the mobile device, in the WiFi settings, you need to select the “BT Changer” connection from the available networks and connect to it.
Password: 12345678
After a successful connection, the exclamation mark will disappear from the display.

  • On Apple (iOS) and standard Android devices, a web page with the settings will open
  • On Android devices, if it does not open automatically or offer a link, you need to enter the following into the any browser: (http:// no https://)


Bluetooth Name Bluetooth Name The name displayed on the mobile device of the BT Changer module. It is worth switching if there are several such devices in your environment. (default: BT Changer)

Default text The BT Changer module can also write individual text on the display up to 12 characters (up to 24 characters for 9-5 SID after 2004). The text can be set here. (default: BT Changer)

Type of Head Unit. Here you need to set exactly which head unit you are using the BT Changer for.

  • OG 9-3 and OG 9-5 with CLARION or PIONEER head unit
  • OG 9-5 2004- whit DENSO navigation
  • NG 9-3 facelift or OG 9-5 with FUJITSU head unit
  • NG 9-3 facelift with DELPHI-GRUNDIG navigation. ONLY US MODEL!
  • NG 9-3 (2003-2006)

Type of SID

  • For OG 9-3, only SID must be selected.
  • For OG 9-5, you have to choose between the 12 or 24 character SID. The 24-character SID was installed after 2004.
  • 9-5 after 2006, in the case of a display in the instrument cluster, the SIU must be selected

Volume Trim Volume compensation in dB. The BT Changer module connects to the head unit at a set volume regardless of the volume of the mobile device. If you can hear the volume difference between the radio and Bluetooth mode, you can turn it up or down here. (e.g. +10 or -3)

Enable scrolling. Here you can turn off metadata scrolling if it bothers you while driving. (default: ON)

Comfort Flash or turn signal
This function is available exclusively for the NG 9-3 (2003-2006) model. When activated, a brief press of the turn signal stalk will flash the indicator 4 times.

Press the “Save” button after each change. Then you have to restart the device, for example with the “Restart” button.


The unique identifiers of the BT Changer.

  • The version number of the basic software (firmware)
  • The unique identifier, is the MAC address of the device

Restart Restart of the BT Changer. After restarting, the device switches to Bluetooth mode..

Factory Reset Restore factory values.


Firmware Updating the basic software of the BT Changer module. This is needed when new features or bug fixes are released. For example, hands-free mode can be activated with a firmware update in the future. The firmware file must first be downloaded to the phone and updated by specifying the path and clicking the “Firmware upload” button. A successful update is indicated by a dialog box. After the update, the module switches to Bluetooth mode. The latest update can be downloaded here:

After the settings, you can exit the WiFi mode by pressing the RESTART or “1” CD button. In this case, it automatically switches back to Bluetooth mode.

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