If there is no update via OTA, then you will want to install via Desktop Manager. First find out what OS you have installed by going to... Options... Device... About Device Versions... and then see the 3rd line down. Should say something like v6.0.0.xxx. That is your current OS installed on your device. Now, the question is whether you want to upgrade or downgrade the OS to see if it will be compatible with your vehicle? Once you have decided on a OS to install, follow our online tutorial on how to do this... http://www.blackberryos.com/forums/b...es-videos.html
Let us know if you have any more questions.