It sounds like I have the opposite problem than most other on the site.
I have a ML 320 CDI 2008 with the IPOD kit installed. I also have the rear entertainment package, which means no AUX jack. It has the COMMAND system.

How do I connect my droid phone that has a 3.5 mm audio jack to my system?

I do have phone paired with the COMMAND system, and it works perfectly as a phone, but I would like to play music over the car's sound system. I found an IPOD to 3.5 mm jack converter on Amazon, but it looks like Mercedes COMMAND does not recognize it based on the user comments.

Link:
Amazon.com: Universal iPod Dock Converter Cable Adapter 30-Pin Female To Stereo 3.5MM Lead Wire Cord Conversion Line Out Zen Microsoft Zune iRiver MP3 Player Droid Android Blackberry Palm Pre Evo Cell Phone Bose Sounddock: Electronics

In Europe with RSE you still get an AUX jack - there is an extra 'Rear' menu that appears on the Audio screen. However if you are in North America, you get MCS-II there and I don't know if that has 2 inputs

Richard

__________________
Of course i'll take it apart.

www.mercupgrades.com
http://www.comandonline.co.uk

I do have a 'rear' entry on my audio menu, and the DVD player can take two AUX audio/video inputs in the rear. Perhaps I can use one of those inputs and connect my phone there. A bit klugey, but I will have to check it out.

Did it work ?
R

__________________
Of course i'll take it apart.

www.mercupgrades.com
http://www.comandonline.co.uk