We all know it - the game lacks radio fixtures. It is possible to do something selfmade, but maybe some inspiration might be helpful.
As opening post, you find various systems of Primus and Globus through the years. While Primus had a reputation of high-tech onboard systems since the early 80s, Globus was mostly conservative.
Looking at the 90s-era POIC setups, I noticed that their cassette tape and CD players required separate fixtures for each one, especially since there is no single fixture that simulates a combined tape/CD player, and back then, some car stereo setups actually combined their functionality into a single unit.
As an aside, here’s the infotainment setup for the '99 LVC LS60:
I needed two variations of a mod fixture to create the basics, but after realizing that the CD player at the bottom didn’t quite have enough buttons, I added a few more above it, including one for the hazard lights.
I think I lost it a bit here in terms of usability, but that seems accurate for an Italian luxury car.
This is the navigation and entertainment system of a 2004 Cavaliere Nobile Arco.