Sat Nav and 6 CD changer Issues

[EightFortySeeEye]

Hi I have an 1995 840ci with a sat nav system in the boot and a 6 disc cd changer but i cant seem to see how or where they are implemented or how to get them to work

does anyone else know how to get the CDs to play and how to get the Sat Nav to work

Thanks

[EightFortySeeEye]

Forget the 6 CD changer I got that working

its just the sat nav that i dont get now lol

[EightFortySeeEye]

any ideas