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Have you run your vin on one of the decoder sites bmw vin decoder to see what options you have?
For example I have:
6FL USB-/AUDIO INTERFACE
6VC CONTROL COMBOX
676 HIFI LOUDSPEAKER SYSTEM
On my car the Y cable isn't needed. Just plug my iPhone into the USB using the iPhone cable. The headphone jack isn't used.
I actually upgraded to the Tune2Air now and just stream using Bluetooth. Phone in my pocket. Sound is great.
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2011 135i w/ DCT | ZSP Sport Pkg | PPK | Ohlins R
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