In section 15 on page 26, figure 8.1 depicts for fuse box. In the upper left corner of this photo is a small black fuse box. This is attached to the main fuse box. The lid open to expose an area that could accept 4 fuses. I want to know what this is, what it does, and what type of fuses belong in it. Thank you. This information is depicted in your BMW 3 Series Service Manual.