Mercedes-Benz C-Class (W205) fuse diagram » Fuse Diagram Use a dry cloth to remove any moisture from the fuse box. Loosen screws (3), fold up fuse box lid (4) and remove it. To close: check whether the seal is positioned correctly in the lid (4). Insert lid (4) into the bracket at the rear of the fuse box. Fold down lid (4) of the fuse box and tighten screws (3).