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      11-22-2012, 11:33 PM   #2
jphughan
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Drives: '16 Cayman GT4
Join Date: Mar 2011
Location: Austin, TX

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Sounds like only the analog audio and USB power wires of your Y cable are working; failure of the USB data wires would explain your phone charging while still not appearing in iDrive and control signals from the car (skipping tracks) not reaching the device, which is why you have to start music from the phone. Maybe try another Y cable?
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'16 Cayman GT4 (delivery pics, comparison to E92 M3 write-up)

Gone but not forgotten:
'11.75 M3 E92 Le Mans | Black Nov w/ Alum | 6MT (owned 5/2011 - 11/2015)