AUX sur Siemens Vdo RD4 N1

Hello.

Where can I find a tutorial???

I've tried with BLAUPUNKT tutorial but I cannot reach to activate it.

Helo,

you need to go to the dealer Citroen to activate the AUX !

I went to the Citroen Dealer and it has activated the AUX but is still not working. I've seen that SiemensVdo RD4 are different from Blaupunkt RD4 and I think is this the problem.

But I should go again to the Dealer?

I went to the Citroen Dealer and it has activated the AUX but is still not working. I've seen that SiemensVdo RD4 are different from Blaupunkt RD4 and I think is this the problem.

But I should go again to the Dealer?

If I press SOURCE the AUX voice doesn't appear....only RADIO or CD