F20 USB Retrofit/OEM part

Hi guys!

I bought a F20 a year ago off the floor, so I had to make some compromises regarding the opions. the USB port was not part of the option but it does have an iDrive.

How much trouble is retrofitting USB with the F20
Is the Radio Pro maybe prepared for USB by default?
May it be enough to just pull a usb-wire from the radio to the armrest?

Or does anyone know of a OEM part number or retrofit?

If anybody can provide usable information on that topic, I'd be grateful.

Thanks
 
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