Peugeot 308 Secret Menu

The exact process to pull up the secret engineering menu depends on the specific infotainment generation installed in your Peugeot 308. Follow these sequence rules based on your model year: 1. SMEG & SMEG+ Systems (Typically 2013–2017) Turn the vehicle ignition to or start the engine.

Press and hold the button (the physical button on the side of the screen) for about 5–10 seconds until the service screen appears.

This screen displays the exact build date of your operating system. It is incredibly useful if you plan to update your maps or firmware via USB, as it tells you your starting point. You can also view the status of the internal storage (e.g., eMMC card health). GPS and Telematics Mapping

The Peugeot 308 is packed with advanced infotainment technology. Many drivers do not know that the system contains a hidden diagnostic menu. This secret menu allows you to view raw system data, test hardware components, and check software versions. peugeot 308 secret menu

This forces the system into "Component Test Mode."

. This allows you to see the "wet" timing belt to check for cracking or swelling without dismantling the engine. Glovebox CD Player:

Press and hold the (piano key) for roughly four seconds. The exact process to pull up the secret

The high-resolution Connected Navigation units found in late second-generation facelifts and third-generation models. How to Access the Secret Menu by Generation

In the automotive world, this is often referred to as the or "System Information Menu." On the Peugeot 308, it resides within the SMEG or NAC/Wave 4 infotainment systems.

Continue holding for a few seconds until the hidden appears on the screen. What is in the SMEG Hidden Menu? Press and hold the button (the physical button

For models equipped with the SMEG or RNEG systems (typically 2013–2021), there is a diagnostic menu that reveals technical details often hidden from the driver. How to Access: Press and hold the

On some NAC systems, pressing all three fingers on the screen simultaneously or holding the "Music/Radio" icon while accessing the map can also reveal hidden, deeper technical settings. Key Diagnostic Features in the Secret Menu

Press and hold the Music/Radio button (or the volume knob, depending on the model) for about 10 seconds until the screen goes black and the Peugeot logo reappears. Summary of Quick Codes Code / Holding Time SMEG Software/GPS Info Hold MENU (5s) NAC Expert Mode Hold MUSIC (4s) + 1111 All Screen Reset Hold MUSIC/Power (10s) All Service Reset Hold 000/Stalk + Ignition Hidden Menu - Peugeot Forums