Hey guys,
I'm looking for some help/guidance in troubleshooting some issues with my electronics which I fear are becoming more frequent.
I have a 2007 328xi with DVD Nav (CCC) and Logic7.
My battery was replaced by a BMW dealer a year ago.
The issues:- For the past year or two my sound doesn't work on winter mornings when it's REALLY cold (like -20C). Also, my front left speaker cuts out sometimes.
My best guess after searching a bit is the the L7 amp has a bad connection on the board.
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- Recently my I-drive crashes/reboots randomly. Started off like once every few months, now it seems to happen once or twice a week.
Screen goes to the splash screen, sound stops working for a few seconds and it reboots.
No idea how to fix this, or what is involved in replacing components. 
HELP!
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- Sometimes my Nav doesn't recognize the DVD - It's a disc that I've burned.
I tried making a new disc and it now happens less often... a few times it has held the DVD hostage and won't eject it.
To me that sounds like a hardware issue, yeah?
My biggest concern is the I-drive issue... It seems the DVD drive is only about $150 on ebay, but I really don't know where to start for the I-drive.
Thanks for any help!