Locate the main electrical panel in the trunk on the right side behind the trim cover and check the printed layout on the panel lid before replacing any blown link.
The vehicle uses multiple power distribution panels, including one in the engine compartment near the battery and another inside the cabin near the dashboard edge. Each panel contains labeled slots with specific amperage values, typically ranging from 5A to 40A, assigned to systems such as lighting, ignition, climate control, and onboard electronics.
Access to the interior panel requires opening the driver-side door and removing the side cover on the dashboard. The rear compartment unit is secured behind a removable lining, while the engine bay panel is protected by a sealed plastic housing. Matching slot numbers with the cover legend helps identify circuits quickly and avoids installing incorrect ratings.
For accurate troubleshooting, use a multimeter to verify continuity across each protective element and confirm voltage supply at both terminals. Never substitute a higher amperage rating, as it can damage wiring and connected modules.
2008 Audi S5 Fuse Box Diagram with Panel Locations and Circuit Assignments
Check the trunk-mounted electrical panel first, as it contains the majority of protected circuits for lighting, control modules, and rear accessories.
The rear compartment panel is positioned on the right side behind a removable trim cover, with numbered slots linked to a printed legend on the cover. Each slot corresponds to a specific system, including tail lights, parking sensors, and audio components, with ratings typically between 5A and 30A. Adjacent to this unit, a secondary relay carrier may be present for switching high-load circuits.
The engine compartment distribution unit sits near the battery and handles high-current protection for systems such as cooling fans, engine control, and ABS. Larger strip-style links are installed here, often rated above 30A, and are secured with bolts rather than simple clips.
Inside the cabin, access the side panel of the dashboard on the driver side to reach another group of protected circuits. This section supports interior electronics, including climate control, instrument cluster, and ignition-related systems, with clearly marked slot numbers aligned to the cover map.
Each circuit assignment can be verified by matching the slot index with the legend and checking the wire color leading from the terminal. This allows precise identification of systems without removing multiple components.
Use a test light or multimeter to confirm power presence at both terminals of each protective element, ensuring continuity and correct voltage supply across all connected systems.
Exact fuse box locations in 2008 Audi S5 cabin trunk and engine bay
Open the trunk and remove the right-side lining panel to access the main rear electrical distribution unit, which holds most low and mid-current protection elements.
This rear-mounted panel is secured behind a carpeted cover and positioned close to the wheel arch. It includes rows of blade-type inserts and a labeled layout printed on the inner side of the cover. Systems such as rear lighting, parking assist, and multimedia modules are routed through this section.
To reach the interior panel, open the driver door and locate the side dashboard cover. Pry it off carefully to expose a compact array of protected circuits linked to cabin electronics.
- Located at the end of the dashboard facing the door
- Covered by a snap-on plastic panel
- Supports climate control and instrument cluster circuits
- Uses smaller amperage ratings from 5A to 20A
Under the hood, find the primary power distribution unit next to the battery. This enclosure is sealed with clips and contains high-current protection links for engine-related systems.
Inside this engine compartment housing, larger strip-style elements and relays manage power delivery to components such as cooling fans, ABS module, and ignition supply. These elements are mounted with bolts or heavy clips due to higher current load.
Follow this sequence to identify each location quickly:
- Check trunk right-side panel for main distribution
- Inspect dashboard side panel for interior circuits
- Open engine bay housing near battery for high-load systems
Use the printed legends on each cover to match slot numbers with connected systems and verify placement before removing any component.