Okay, first off, as I mentioned this is NOT for the OEM NAV radio in the Crossfire, but was the only Becker system I found with the pin-outs that were correct (Traffic Pro).

Second, I would bet that the telephone and microphone pins have been disabled in the software. The speed signal is not used by the Radio, but by the Navigation system. This wire should be present even for the standard Becker units without NAV.

As to the CD Changer connections, the "Two" connections you refer to are actually in a modular plug which can be broken down into three sections. The connections in C3 are the actual analog audio connections and can be wired directly to a pair of RCA plugs using the common ground between them. Here's the rub... You can't use the CD inputs unless you can trick the unit into believing there is a changer attached to the connections in C2. I currently have a changer in the rear cargo area and have my iPod on the CD input. I don't get the song names or any real controls, but I don't really need them.

Hope that helps.