I believe I have a solution for you. But I checked with Yakima and they do not recommend any trunk mounted bike racks for your 200 Saturn Ion quad-coupe.
For a comparable bike rack that has been confirmed to work on your vehicle check out the Thule Passage 2 bike rack # TH910XT. Thule confirms this will fit your vehicle and should work well for you.
Check out the review video and installation instructions I attached.
If you plan on carrying any bikes that do not have a top frame bar... view full answer...