It is the trunk kit... I searched several other forums and saw something similar on e46 fanatics, but there wasn't any resolution.. I have been using it for 2 days now, and it works as expected as long as I switch to FM and shut the radio off prior to turning off the car. Also, the book that came with it says to select disk 6 track 3 to have it display on the OBD, but if I do that it doesn't work. I need to set it to core 1.4.00 to get it to display on the OBD. If I select track 6 disk 4 it shows on the radio. Could I possibly have a defective unit?