I have an E38 7 Series, but I upgraded the audio and navigation to the equivalent of a late X5 (new gen radio, 16x9 screen, MKIV DVD navigation, DSP, etc.). I just installed the BMW/Nakamichi glove box CD changer, and it works great. The only problem is that I did not get any instructions with it (eBay purchase), and it does one quirky thing that I can not figure out.

If I am listening to a CD, and I switch to FM, the CD changer will not resume playing when I switch back to CD. It does the same thing if I am listening to a CD and I turn the radio off and back on-- it will not resume CD play. However, if I switch the car off, the CD will resume play when I restart the car. Is this normal? Has anyone else seen this?