I have a 1988 BMW 325 IX. In the upper left corner (next to the main fuse panel) is a 2nd fuse panel. This is a small panel and only maintains 4 fuses. It is black with a black cover. The wiring from the panel runs into the main wire loom on the firewall. WHAT IS THIS? What is its function? What size fuses go in this panel? My dealership has no idea what this is. The books and manuals that I own do not address this little electrical gizmo. Looking forward to finding out what this is all about.