if you need assist you can hook both them simultaneosly, this configuration supported
USB Audio option wired to MULF2HIGH, Bluetooth and Assist to TCU
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E81 2007 130i 6cylinder Montego blue
Retrofits: Harman Kardon, High-beam assistant, Removable tow hitch. Auto-dim folding exterior mirrors. Lumbar support. Perfomance Brakes.
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