As a new member, I don't know if this has been discussed. I think it will provide some insight to dos1973's problem.
I have an iPhone 5. So, there is no BMW cradle for my phone. With the Y Cable I have to use the lighting to 30 pin adapter. This allows access to music but no apps on the iPhone or BMW App. With a lighting to USB cable connected to the USB port I get BMW App and iPhone apps. I listen to podcasts in my car which required iPhone app accessibility. I'm told a cradle will be available for iPhone 5 around June. Can't wait because it's a hassle to have to switch cables to access different functions