Android Auto (TM) is not officially supported in Southern Africa. You can however download a safe installation file here and use it to (side-load) install the application on your supported android phone.
The app will automatically be updated on the playstore when updates are released.
First, find-out what version is best for your device by using this App
Click Here to Download 32 Bit Version
Click Here to Download 64 Bit Version (arm64-v8a)