W220 Angle Sensor

The Steering Angle Sensor (SAS) on a Mercedes-Benz S-Class (W220) is a frequent source of dashboard warnings, primarily because it communicates directly with the ABS, ESP (Electronic Stability Program), and Airmatic suspension networks.A fault in this sensor immediately triggers the dreaded "ESP Visit Workshop" or "BAS ABS" warning lights, and can sometimes cause the heavy, stiff steering feel known as "limp steering mode