We are looking at a GL 450 and have a couple of questions about the factory installed entertainment system.

1. Does the iPhone interface with the navigation/stereo system allow you to control it through the iPhone itself, or do you need to control it through the navigation system? I.e., if I wanted to utilize the iPhones repeat function for particular song can I do that on my phone and it will come out through the stereo? It's not clear to me if there is a difference in this regard if connecting through Bluetooth or USB.

2. With respect to the middle row dual video screens, can you use two different sources, one for the left screen and one for the right screen? I.e. can each of my two children have an iPod touch or iPad hooked in as a separate source, and different video appear on each screen with wireless headphones?

Thanks.