If your main car battery is weak or old, the sensitive electronics in a Mercedes may throw "ghost codes" because they aren't receiving a steady 12 volts. How to Fix Error B1FBD54 (The "Free" Methods)
Before you assume a major part has failed, it’s important to understand what usually triggers this specific fault: mercedesbenz errorb1fbd54 free
This can force the modules to re-sync and may clear a "Missing Calibration" error. 2. Check the Fuse Map If your main car battery is weak or