If so, simply remove the centre console from behind the handbrake, up to the top (plenty of guides on here)
Then you have room to reach in to it.
Best method is to undo as many of the mounting bracket bolts as you can, giving wriggle room to get it out.
Unless you are intending to fit another one then you will need the lower storage cubby. They simply push fit into place once the mounting brackets are all removed.
Halfway down this thread, Wassup seems to have found a fast way to remove the changer…
https://z4-forum.com/forum/viewtopic.php?p=1917340&hilit=Remove+cd+changer#p1917340