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Originally Posted by crystalworks
Because the actual "radio" is in the battery tray. What you see in the dash is basically a navigation display with some other functions that communicates to the radio in the trunk area. You can see the radio there in the picture under the green arrow.
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So why would the radio need speaker connections? Normally there would be line level signal from various sources into a pre-amp that switches between them to feed the actual amp which outputs to the spkrs. But as far as I am aware, BWM tend to handle everything at spkr. level and simply boost it further with higher spec options. What would be the spkr. level connections between radio, amp, CD player, sub etc? Is there a clear diagram anywhere I could download?
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If yours has nav, then it probably is configured exactly like mine is. Both of my X5's with navigation (one with DSP and one without) used external amplifiers in the left compartment area of the trunk. Where the CD changer is.
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I have a box in the LHS at the bottom. It is mounted at an angle and I had thought it was the Bluetooth module (I think I read that somewhere). The CD player, Nav DVD and other items I've put in that 'rack' will all come out as everything will be handled by the new head unit. I'll need to add sufficient line level wiring from head unit back to the amp which will go in that rack instead. And then it's just figuring out where the spkr. wires go and that's what I'd like to establish before I start. So I appreciate your help on this.