Fuse box Audi A4 (B8) - fusesdiagram Fuse box in passenger compartment Audi A4 (B8). fuse box location. The various electrical circuits are protected by fuses. The fuse boxes are located behind covers on the left and right sides of the dash panel and in the compartment on the right side of the boot. Audi A4 B9 (2015 – ) – Fuse Box Location and Fuses List Nov 25, 2018The Audi A4 B9 (2015 – ) have 4 fuse boxes location. Two on the driver’s and passenger footwell under the footrest, other on dashboard driver side and one in the lugage compartment – Scroll down to see how to access them and the fuses list.