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Hi all, that's all very interesting, as I have about the same questions.
The unit which came standard in the car is the Alpine unit, no satnav and only USB/AUX in the arm rest, small screen.
I take it this must be the HU ENTRY (CHAMP 2) unit having BMW P/NO 9223010.
If the Alpine unit was trouble free I would have left it but it isn't trouble free and is changing languish and options continuously.
Just by chance I got offered a complete set, no cables, which has a wide screen and Harmon Becker unit P/NO 925700801.
I would highly appreciate some info concerning connections like, can I use the standard cables and will the USB/AUX still work as is, or is this combination a mission impossible?
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