How to Connect an iPhone to an S430
1. Insert one of the two plug ends of auxiliary cable into your iPhone's headphone jack. Regardless of whether you are using an iPhone 4, or an older model like the 3G or 3GS, the headphone jack is located on the top of the device.
2. Connect the second of the two plug end of the auxiliary cable to the 'AUX' input on your S430's car stereo faceplate.
3. Turn on your S430 and press 'AUX on your car-stereo faceplate. This will activate the 'AUX' input and allow you to listen to your iPhone in your car.