You can toggle between “CD Track” and “CD Play” on the stock SAAB 9-5 stereo by pressing the center of the <<Seek>> button. The stereo display changes between Track and Play. A CD can "fast-forward" or "rewind" in both modes by pressing and holding down an arrow button, but you can jump forwards and backwards by entire tracks when you press and release the arrow buttons in “Track” mode.
Switching to “Play” mode to prevent the CD from jumping tracks is useful when you are listening to an audio book and you want to fast forward or rewind a little bit but don’t want to risk skipping all the way to a different chapter by mistake.
Pressing the center part of the <<Seek>> button doesn’t do anything in tape or radio mode.