I couldn't find any connector for a CD changer in the trunk and I also checked the CD unit and has to connector in the small connector which makes me think my car is not wired for CD changer. I also don't have the MODE option on my radio. Have you seen this? Is this common or possible? I thought that all BMWs come pre-wired for CD changer. Not that I need to install a CD changer but I was looking into an AUX Input and my CD unit (front) does not have the pins for that. The only work around was the CD changer mode. Any thoughts?