Ok, finally got around to installing the AUX/CD cable option. No instructions were included with the harness. Removing the radio and CD are easy with a 10T screwdriver. The harness plugs in between the body and CD. Two blue plugs need to be removed on the body side. One slid out easily. The other had a tab to remove before sliding the plug out. 3M double sided tape was used to hold the Bluetooth antenna along side the CD player. Once installed, you can see it under the CD. Radio settings are set to AUX once Bluetooth is connected. the steering wheel volume buttons work. Unfortunately, forward or reverse song don't work. It will do for now. No more Bluetooth adapter in the 12V port. Found the AUX had 5 levels of out put. Raised them to level 5. I'll have to try calls and maps directions later.

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'06 X5 3.0i - bought @143,123 miles (12/26/20)