How to Connect an iPod to a Mercedes Radio

1. Purchase a cassette tape adapter. These devices consist of a cassette tape connected to a headphone plug by a length of audio cable. The tape goes into the tape deck in the stereo, and the plug goes into the headphone jack of the iPod. The audio from the iPod will play through the tape and subsequently through the Merecedes' speakers.
2. Broadcast the iPod audio through an FM transmitter. These devices are a bit more expensive than tape adapters, but they are a good alternative if the Mercedes does not have a tape player in it. Find a radio station with plenty of static, tune the FM transmitter to that station and press play on the iPod. The Mercedes' antenna will receive the low-level transmission and process it the way it would any other radio broadcast.
3. Take the vehicle to a car audio specialist, and ask about installing an auxiliary cable or iPod interface dock. He may have different recommendations based on the age of the Mercedes, the model or the type of stereo. An auxiliary cable is a simple audio cable that is wired into the auxiliary input in the back of the stereo. It can be plugged into the headphone jack of the iPod. An iPod interface dock is a complex, small connector that plugs into the data port of the iPod and allows for full integration of the iPod into the car's stereo, with browsing and full-display capabilities.