Instructions on how to use it or how to install it?
Download manual: http://www.navplus.us/forum/viewtopic.php?t=662
Multiple install guides with pictures: http://www.navplus.us/forum/viewtopic.php?t=462 (scroll down to the A4 B6 section)
Download manual: http://www.navplus.us/forum/viewtopic.php?t=662
Multiple install guides with pictures: http://www.navplus.us/forum/viewtopic.php?t=462 (scroll down to the A4 B6 section)