Use this menu strictly to check your firmware version or read unmasked vehicle statistics.
Before exploring the secret menu, keep in mind: peugeot 308 secret menu
Depending on your model and infotainment system, the "secret handshake" varies. Here is how to get in: SMEG / SMEG+ Systems (Common in 2013-2017 models): Turn on the ignition and wait for the system to load. Press and hold Use this menu strictly to check your firmware
For 2014-2016 models known for screen degradation: peugeot 308 secret menu
: These menus are intended for technicians. Avoid deleting logs or changing deep configurations unless you are troubleshooting a specific issue, as it may impact system stability. Hidden Menu - Peugeot Forums