Quick answer “Radar Sensor Dirty” (or “Currently Unavailable — Radar Sensors Dirty”) means the front radar sensor (A108) is blocked, misaligned, or has lost calibration — causing Active Brake Assist, Collision Prevention Assist Plus, and Adaptive Cruise Control to deactivate. ...
Pre Safe Functions Limited Mercedes: Meaning, Causes & Real Fixes When your Mercedes displays the warning “Pre Safe Functions Limited”, it means that one or more sensors within the Pre-Safe safety system are malfunctioning, obstructed, or not communicating correctly, limiting ...