Want to access the on your Citroën C3? Here’s the code to enter diagnostic / engineering mode (usually on the touchscreen or trip computer):

📌 Code can vary by head unit (NavDrive, RCC, NAC, SMEG, etc.).

Alternatively, try this sequence on the radio/touchscreen: 🔢 (press in order while in service menu).

Here’s a social media post you can use for : 🚗 Citroën C3 Secret Menu Hack – Engineering Mode Code 🔧

📟 ➡️ Press and hold the “MENU” button (or “SETUP”), then enter CRD or 0205 (varies by model/year).