The steering angle sensor (SAS) plays a crucial role in the safety and steering system of your Mercedes. It determines the position of the steering wheel and transmits this information to the ESP (Electronic Stability Program) control unit. This allows the ESP to correct oversteer or understeer and improve vehicle stability.
Symptoms of a faulty steering angle sensor:
- ESP warning light on
- ABS warning light on
- Difficulty turning the steering wheel
- Vehicle pulling to one side
- Power steering errors
- “Steering angle sensor” error message
Steering angle sensor reset:
Method 1: Diagnostic tool
- Connect the diagnostic tool to your Mercedes’ OBD-II port.
- Select the “Steering angle sensor reset” option.
- Follow the on-screen instructions to complete the reset.
Method 2: Manual procedure
Important: This method may vary depending on your Mercedes model. Please consult the owner’s manual for specific instructions.
- Turn off the ignition and wait 30 seconds.
- Turn on the ignition without starting the engine.
- Turn the steering wheel fully to the right, then fully to the left.
- Return the steering wheel to the center position.
- Start the engine and let it idle for 5 minutes.
Notes:
- If the reset fails, the steering angle sensor may be faulty and need replacement.
- It is recommended to have the reset performed by a qualified mechanic.
Additional information:
- You can find more detailed instructions for resetting the steering angle sensor for your specific Mercedes model on online forums or in workshop manuals.
- It’s important to note that the steering angle sensor reset can only be performed if your Mercedes’ battery is in good condition.
Conclusion:
Resetting the steering angle sensor is a relatively simple procedure that can be performed using a diagnostic tool or manually. If you encounter difficulties, it’s recommended to consult a qualified mechanic.