Where is the fuse box on the 2001 Audi A4 - answers The fuse box on a 2005 Audi A4 is located under the dash, near the hood release. It contains fuses for the horn, wipers, and radio. Read More Fuse box Audi A4 (B5) - fusesdiagram Fuse box in passenger compartment Audi A4 (B5). fuse box location. The unit is located under a cover at the end of the dashboard on the left-hand side. To open cover insert a screwdriver in the slot below the cover and pry it off. The crank handle for manual operation of the electric sun roof is clipped on the inside of the fuse box cover.