Suzuki uses the Clarion 125 CeNet iPod interface, so you only get the 6 playlists (it treats the iPod like a 6 disc changer, each "playlist" is a CD).
It also locks out the iPod, so you can not scroll, or use any of the functions.
The Clarion interface does charge the iPod, and you can stash it way in the glovebox, so nobody knows it there. You will get part of the song title displayed on the radio (I'm not sure of the number of characters it can display) and you can skip up and down a track using the steering wheel audio controls (if your SX4 has them).
I have a cable for the SX4 that plugs into the back of the radio and activates the "AUX" audio input. You can plug it into the iPod headphone jack and get a direct audio input into the deck..
e-mail me at
jtco@sympatico.ca for details if you are interested.
Cheers,
Tim