On my 1994 Mercedes E320 wagon, I noticed on the front left side facing me in front of the battery, a missing fuse/amp on top. See the color red circle on the photo attachment below. It looks like a missing amp 30 fuse, is that correct? If so, what is the fuse or amp for, anyway? What is the correct amp number, 10, 20 or 30 amp? Any helpful comments/feedback is appreciated.

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