308 Secret Menu — Peugeot

This applies to most second-generation Peugeot 308 models (T9 chassis, roughly 2013–2021) equipped with physical toggle or piano-style keys beneath the touchscreen:

Release the button when the screen changes to display the hidden service menu. How to Access "Expert Mode" on Later Touchscreens (2017+) peugeot 308 secret menu

The most common method for the Peugeot 308 (SMEG or NAC touchscreen systems) is as follows: This applies to most second-generation Peugeot 308 models