Bmw e82 steering button scramble

boost135

New Member
Jun 20, 2017
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bmw 135i N54
Hi all

Wanted to find out if someone could help me
I would like to connect the call button on my steering wheel to my gfb3 controller and make it act as a scramble button, does anyone have a wiring diagram of the multifunctional steering or even the bmw business radio (cd73), currently I find it difficult in a dig race to press the scramble on the gfb. I have searched all over the net can't seem to find a diagram. I would like to locate the wire out of the steering column.
 

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