iPhone interface

What do I need to buy to upgrade this to an iPhone 4 kit? I want to play music and prefer to make calls to.
I read this thread but want to use it for the steering wheel etc.
https://mbworld.org/forums/c-class-w...layer-etc.html
Its a C200 2006 Super Sports Kompressor.
PS - I believe your new C200K is a Sports Sedan vs. a Super Sport

They want to put in a bluetooth kit and then an ipod adaptor for the music.
For that $$$, I might just put in the AUX cable and be done with it.
But I will post a pic next time I'm in the car and remember.



