308 Secret Menu Better | Peugeot

To access the secret engineering or "Expert Mode" menu on your Peugeot 308

Preparation: Turn on the ignition or start the engine to power the infotainment system. peugeot 308 secret menu

The on-screen secret menu only shows the state of the infotainment system. If you are looking to unlock actual vehicle convenience features—such as activating digital cornering lights, disabling annoying chimes, or adding custom themes to the digital i-Cockpit—you cannot use the touchscreen. To access the secret engineering or "Expert Mode"

Method B: Steering Wheel Combo (RNEG / Older Systems)

Applicable to: Earlier 308 models (T7) or models with smaller non-touch navigation screens. Method B: Steering Wheel Combo (RNEG / Older

services require you to be safely stopped before making deep system changes. Are you trying to troubleshoot a specific system error , or are you just looking to customize your dashboard layout SMEG navigation hidden menu in Citroen and Peugeot

Internal Temperature: Monitor the temperature of the head unit to diagnose screen flickering or crashes.

This paper explores the existence, access methods, and functional utility of the "secret menu" (also known as the engineering mode or hidden menu) within the Peugeot 308 infotainment system. Focusing primarily on the second-generation T9 model (2013–2021) and touching upon its predecessors, this document details the procedures for accessing diagnostic data, screen calibration tools, and system information not available through the standard user interface. The paper analyzes the implications of these menus for advanced troubleshooting while highlighting the potential risks associated with unauthorized system modifications.