"Radio presets" refer to specific stations that a person has saved on their car's radio so they can easily switch to them without searching or tuning in manually. Full definition
Kudos to Mini for the row of radio preset buttons. (driving.ca)
The latter isn't always responsive, though, and the small touch points and lack of physical radio preset buttons are annoying. (automobilemag.com)
You've also got steering - wheel controls at your disposal and a small, flexible, and functional information display in the instrument cluster that allows the driver to jump between turn - by - turn navigation directions, contacts for hands - free calling, and the current audio source with the ability to browse radio presets with a thumb roller. (cnet.com)