One other idea that recently popped into my head: This thread should address the differences between combox and the other entertainment system options like enhanced bluetooth and whatnot. When I bought my 135i, it took some research (which was aided by the fact that I had built an incomparable number of 1-series on BMWUSA.com), but I eventually realized I needed to buy BMW's y-cable (which was garbage) or the Tune2Air bluetooth adapter which works perfectly.
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2012 BMW 135i Space Grey Metallic M-Sport DCT Dinan S2
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