In addition to GND and B+ you'll also need to connect pin 12 - Acc-IN (red) to a switched power source. B+ should be connected to an unswitched (permanent) power source.

You might not find a switched power source in the OEM wiring to the old Nav display, as it used data signals on the I/K-bus to turn the unit on and off, not switched power.

Pin 10 on connector E (Blue) labelled "Ant" is to power an electric retractable antenna - you can ignore it - or use to to power an active antenna system if you have one.

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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)