Mercedes-Benz C-Class: Fuse Diagrams and Commonly Blown Mercedes-Benz C-Class: Fuse Diagrams and Commonly Blown Fuses. Use the Fuse Diagram found with the fuses, or attached below, to determine fuse location and amperage. Note: US spec models may have no fuses in the left-side instrument panel. Find a bad fuse by checking continuity with a multi-meter. Fuse box Mercedes w203 - Fuses box diagram Locate fuse and relay. Fuse box diagram. Identifying and legend fuse box Mercedes w203 2000-2008. Fuse Box Diagram Mercedes-Benz Vito (W639; 2004-2010) Fuse box diagram (location and assignment of electrical fuses) for Mercedes-Benz Vito / Viano (W639; 2004, 2005, 2006, 2007, 2008, 2009, 2010).