Blaupunkt rd4 berlingo3 van

[Datcrew]

Hi all
I have a berlingo 3 van 59 plate and it has a blaupunkt rd4, I have noticed there is no fader control on it,can you get this switched on as I want to use the rear speaker outputs on the head unit(if it has any)
Thanks
David

[Datcrew]

Just to let people know,if you have an rd4 you can get the front/rear fader switched on,just have to ask a Citroen garage to turn it on,it done the same way as turning on aux1(through data cable and laptop)