If you have a car radio with an Android operating system, it is possible to download navigation software for free. There are navigation softwares that work without internet after installation. The advantage of this is that you always have the most recent maps and that these maps are automatically updated when you have an internet connection. Below we show you how to install a software. Please note that this software may no longer be available via Playstore, just search for Offline Navigation or for Navigating via the Playstore.