I swear they used the worst sort of recycled paper on the lid of the W116 fuse box. I have yet to see one intact.
Go to
www.w116.org and look for the Shop Manual. The fuse box layout is in there somewhere, as well as most anything else you need to know about your ride.
Rick
Update- for some reason the wiring section on the referenced manual is not working. PM me with your email address and I will send it to you. It has the fuse arrangement, but doesn't look like the picture on the fuse box lid.