As a patch release it doesn't bring any new features but includes bug fixes at the top of previous Qt Automotive Suite release. We will continue releasing regular updates as new patch level release in the future; next update should be available few weeks after soon coming Qt 5.12.5 release.
You can get Qt Automotive Suite 5.12.4 as an update to existing Qt Automotive Suite installation via maintenance tool. Or you can do clean installation by using Qt Online Installer which can be found from your Qt Account.
If you have questions about Qt Automotive Suite, please contact us.