It was noted in my photo thread (http://www.m3post.com/forums/showthread.php?t=126672
) that my left side trunk liner panel is different than some others. Here is mine, followed by an pic of rvacha's:
It appears the difference is mine was ordered with the HD radio tuner, which resides right under that plastic cover. It is labeled "Visteon 7B IBOC tuner". Below that is the rack for mounting the CD changer and below that the amp. Cars without HD seem to not have this extra compartment. Installing the CD changer in these cars will require the mount and new trunk liner panel.