For the iPod interface you have two options.

1) get the kit that uses the existing cd changer cabling. iPod will sit in the glovebox and if you have the cd changer you won't be able to use it anymore. Coding will be required.

2) retrofit the 6fl iPod/USB interface. This option is pricey as it requires additional hardware and is somewhat dependent on the BMW assist telematics unit ... If you have that. Coding will be required.