If you really want to play a CD, they do have external units that you can plug into the AUX or a USB and play for as low as $15.00They mentioned previously that even the base stereo will have USB, AUX, and bluetooth connectivity.
http://www.elioowners.com/threads/hi-im-drew.7387/#post-150761
WIth USB you can plug in a phone, iPod, or just a small USB stick. I love using the small "nano" sized USB sticks. I have no idea if the CD player in my Miata or my wife's Venza even work, we have never used them. The last time I used an audio CD was to rip the last of my old CDs to computer about 6 years ago?
I would not be shocked if the Elio does not play CDs.
DVD
https://www.amazon.com/Best-Sellers-Electronics-External-DVD-Drives/zgbs/electronics/1292113011
CD
https://www.amazon.com/Best-Sellers...onics/1292121011/ref=zg_bs_nav_e_5_1292113011