Peugeot 308 Secret Menu (Latest)

Press and hold the piano key button for about 5 seconds.

Once you are inside, you will be greeted by a monochrome, text-heavy interface. Do not panic. Use the volume knob to scroll and the "OK" button to select. peugeot 308 secret menu

Modern vehicles, particularly the Peugeot 308 (2013–2021, T9 generation), contain complex infotainment and instrument cluster systems. Beyond the standard user interface, these systems feature a factory-embedded "secret menu." This paper provides a formal guide to accessing, navigating, and interpreting the hidden diagnostic and configuration menus within the Peugeot 308’s central display (SMEG or NAC/Wave 2/3 systems) and instrument panel. The purpose is to equip advanced users and technicians with the knowledge to retrieve real-time vehicle data, perform component tests, and view system versions without external diagnostic tools. Press and hold the piano key button for about 5 seconds