The factory installed external CD changer* needs to be removed/disconnected from the car’s optical ring if you want to use all functions of the Gateway (music and menu). This is because the Gateway emulates these functions, and the car can only work with one CD changer in the same time. If you don’t remove them, any various problems may happen like:
- Volume changing automatically / randomly within 10-15 seconds or more
- CD changer (Gateway) as a source can or cannot be selected but it reverts you back automatically to radio mode shortly (within 2-3 seconds), or you can only select the Gateway if your reset it by unplugging it from power or using the reset switch
- Function buttons are not or only partly working (e.g. FFW)
- Error messages from the car
- The Gateway or car radio resets, is not available at all
Some car types also require coding, or else the Gateway can’t be reached in the car menu. A typical situation is by BMW that the CD changer can be selected, but the CDs are all greyed out. For further information about coding please read section M! If the car can only recognise the Gateway when you reset or unplug the power of Gateway, then please make sure you added constant power to the Gateway, for further information please read section P!
*Removing the CD changer: If you have a Dual FOT (xxxxMO2) version Gateway, then you can keep the CD changer if you connect it to the right side optical connector of the Gateway.
The special case by Porsche: If you installed everything correctly, also the Gateway works properly, but the following message appears on the screen "System error: CD Changer not available." everytime when you start the car. The message can be closed if you press OK, but you can also remove the error message permanently: based on the feedbacks of some Dension installers we know, that if you decode/remove the factory phone from the programming of the car, then the error message for the CDC won't come back.
The special case by Audi: If you installed everything correctly, you can see the 6 CDs of the Gateway in the car menu (CD7-CD12 or CD1-CD6), but there is no text information if you look at CD12 (or CD6), "Gateway menu" is not visible. (And if you select CD12 then nothing happens, except that it switches automatically to CD7.)
Then please go to the settings menu of the Audi and make sure "CD-Text display" is enabled. After that you will see "Gateway menu" appearing on CD12 (or CD6), and you can select it and everything should work properly.