I have a 2009 Honda Civic. It interfaces with an iPod/iPhone with a USB cable, as the picture shows. When the iPhone is plugged in, the music app displays an "accessory attached" screen that doesn't allow any navigation or control. I've had iTunes Match since last year. When playing through the car's iPod interface, the music app shuffles through songs that are already downloaded. So the Civic's interface will show "Playing 1/160" which means I have 160 songs downloaded on to the iPhone. This is how it has worked for the entire past year and continues to work this way with my iPhone 5 with iOS6 and a lightning cable connected to the car. BUT....something strange happened this morning. I plugged in my iPhone and my car started playing a song I knew wasn't downloaded on to my iPhone. I looked at the car's display and it read "playing 1/4500", meaning it saw the 4,500 songs that were in my iTunes Match library. During my drive, the phone/car continued to play streaming music. I maybe played and skipped through 10 songs during my trip. The next time I got in my car, it didn't read the iTunes Match library and was back to playing only the songs available on the phone. Any ideas on how or why this happened? I've wanted to use iTunes Match in my car for forever. Whatever glitch/bug happened this morning showed that it is possible. Not having iTunes Match in the car is especially cumbersome now that iOS6 doesn't have that cloud download button in the music app.