Playing internet radio app on 4S over MB audio system

Question

I have an iPhone 4S and ran an internet radio app on it. Then I connected the phone with the ausio system of my 2011 MB E550. For about 2 seconds I could hear the radio station over the car speakers but then the phone switched to the ipod app. I could not switch back to the radio app neither was I able to stop the playing song on the phone since the desplay would not allow me to actually go into the ipod app while connected to the car audio system.
Why is this and is there a way to make the phone play the internet radio station?
The fact that I heard the radio station for about 2 seconds tells me that it generally is possible but then there must be something in the iphone software which makes it flip to the ipod. Can this be bridged without sacrificing the phone's warranty?

Answer 1

I'm not saying that this is your problem but it could potentially be and needs to be corrected. After making the corrections as stated below test and let us know if things improve.
If your DHCP range is 2 to 254 that means the whole range of addresses can be assigned to dynamically. This can cause problems because you haven't left any addresses available to be assigned statically. You will notice that addresses 90 and 100 are within that range.
Set the DHCP range to 250 to 254. That reserves an range of 50 addresses for use by the DHCP. You don't need to make any changes to the IP addresses of the PC or Express as their addresses will now fall outside the range reserved for DHCP.