You can not use that nav computer in your car.
You will need to get a MKI, MKII, MKIII, or MKIV nav computer for your car. The Japanese nav computers will only work in Japanese cars in Japan.
Here is a link to a navigation computer buyers guide. (Just delete the space in the URL to make it work.)
2000 E38 750iL Highline Edition with 18" Style 118 Wheels and Runflats
MKIV and 16:9 Navigation, TV, and Backup Camera
New Gen Radio, Sirius, Aux Input for my iPod, Bluetooth, and E39 M5 Tire Pressure Monitor System