Menu | Peugeot 308 Secret

Most first- and second-generation Peugeot 308 models utilize the Continental SMEG or SMEG+ navigation unit. Unlocking the hidden installer/service menu on these units requires a specific physical sequence:

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.

Accessing the Undocumented: A Technical Overview of the Hidden Diagnostic Menu in the Peugeot 308 (T9 and Pre-Facelift Models) peugeot 308 secret menu

Unlocking the Peugeot 308 Secret Menu: Hidden Features, Diagnostics, and Expert Tweaks

If you have a physical volume knob:

If you are looking for simple car health data rather than system engineering settings, Peugeot provides a basic, built-in diagnostic tool accessible through the standard menu.

Hold down the physical button or the Settings icon for 5+ seconds until the system version page appears. Most first- and second-generation Peugeot 308 models utilize

However, if you access the QWERTY keyboard cheat codes or deep engineering menus, unless you are an expert. Doing so can accidentally brick your infotainment unit, leaving you with a blank black screen that requires a trip to a dealership to re-flash using proprietary Peugeot software. Summary Cheat Sheet Infotainment Unit Trigger Action Best Hidden Feature SMEG / SMEG+ Hold Settings / SRC icon for 7 seconds Firmware version check & Cheat Code Keyboard NAC (Newer models) Hold Music or Nav Piano Key for 10 seconds Deep hardware temperatures & GPS diagnostics RT6 (Older models) Hold the Setup button for 5 seconds Direct audio module testing

The secret menu, also known as the "diagnostic menu" or "hidden menu," is a service menu that provides access to advanced settings, diagnostics, and calibration options. It's not part of the standard user interface, and Peugeot doesn't advertise it publicly. This menu is primarily intended for dealership technicians and mechanics to troubleshoot issues, adjust settings, and perform maintenance tasks. SMEG & SMEG+ Systems (Typically 2013–2017) Turn the