C5 Tourer 2008 Exclusive - no sound from rear speakers

[Insider]

Boa tarde pessoal,

Tenho uma C5 Tourer exclusive de 2008 com RD4. Apenas tenho som nas colunas da frente, nas colunas das portas traseiras não toca, e no rádio não vejo a opção para configurar o audio (Fad/ Bal/ Graves/ Agudos) já pesquisei o menu completo e não encontro nada.
Queria que as colunas traseiras funcionassem como eu acho que seria suposto.

Obrigado.

[myglaren]

Please post in English. Use a translation program if necessary.

Good afternoon everyone,

I have a 2008 C5 Tourer Exclusive with RD4. I only have sound in the front speakers, the rear door speakers don't work, and I can't find the option to configure the audio (Fad/Bal/Bass/Treble) on the radio. I've searched the entire menu and can't find anything.
I would like the rear speakers to work as I think they should.

Translated with DeepL.

[wurlycorner]

Did they used to work and have stopped? Has anything in the system been changed recently

[Insider]

When I bought it, they said they had turned them off in the system, however, there is no option in the menu about balance or audio configuration (bass, treble, mid, etc.)

Thanks for the translation

[shtu]

At a guess, they have removed the function using a diagnostic tool. You need a suitable diagnostic tool to turn them back on.

Autoradio - Configuration of the radio - Fader Function - set to "Activated".

At the moment it will be set to "Absent".