How to Check if Your Mercedes-Benz Has FBS3 or FBS4 Using the YOUCANIC Scanner

About this video

Wondering whether your Mercedes-Benz uses the FBS3 or FBS4 anti-theft system? In this quick guide, we’ll show you how to identify the FBS version on your vehicle using the YOUCANIC UCAN-II or UCAN PRO scanner.

✅ Why it matters:
Knowing whether your Mercedes uses FBS3 or FBS4 is crucial when replacing control modules like the ECU, TCU, ESL, or EIS, especially if you plan to perform DIY repairs or coding.

🔍 In this video, you’ll learn:

How to access the relevant modules

Where to find the FBS version in the diagnostic menu

Tips to avoid common mistakes when working with theft-relevant parts

📲 Get your scanner here: https://www.youcanic.com/scanner

Works on most models from 2004–present, including C-Class, E-Class, S-Class, CLS, GLE, and more.

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