Check that the CANBUS box is correctly shutting down the unit when the key is removed. If the screen stays on, the "ACC" and "BATT" wires may need to be swapped. Resetting: If the system freezes, use a paperclip to press the small (Reset) hole on the front faceplate. Are you having trouble with a specific feature

Here is a comprehensive guide to understanding and operating the BMW 8259-ver01 multimedia system. Overview of the BMW 8259-ver01 Multimedia System

– Sites like Manualslib , ManualsOnline , or BMW TIS (Technical Information System) may have it.