- Faulty Wheel Speed Sensor: The ABS system relies on wheel speed sensors to monitor the rotation of each wheel. If a sensor fails or becomes damaged, it can cause the ABS light to illuminate.
- Damaged ABS Control Module: The ABS control module is the brain of the ABS system. If it malfunctions or fails, it can cause the ABS light to turn on.
- Malfunction in Hydraulic Unit: The hydraulic unit serves as a central controller for distributing brake fluid to the brakes. If it encounters a problem, it may trigger the ABS indicator.
- Air in the Brake Lines: The presence of air within the brake lines can result in impaired braking performance and cause the ABS light to come on.
Steps to Diagnose the ABS Light Issue:
1. Check the Wheel Speed Sensors: Inspect the wheel speed sensors for any damage or loose connections. Ensure that they are securely attached to the wheels and free from any debris or obstructions.
2. Examine the ABS Control Module: Visually assess the ABS control module for signs of damage or corrosion. Check the electrical connections to the module to make sure they are secure and free from corrosion.
3. Test the ABS Control Module: Use a diagnostic tool to test the ABS control module and its functionality. Some issues related to the ABS control module may require professional assistance for further repair.
4. Check the Brake Fluid Level: Verify if the brake fluid level is within the recommended range as specified in your Mercedes-Benz 190E owner's manual. Low brake fluid levels can trigger the ABS light.
5. Inspect the Hydraulic Unit: Examine the hydraulic unit for any leaks, damage, or abnormalities. If you notice any issues, consult with a qualified mechanic to address them.
6. Seek Professional Advice: If you cannot identify or resolve the issue on your own, seek assistance from a professional auto repair shop or a Mercedes-Benz dealership. They have the expertise and necessary equipment to diagnose and fix the problem accurately.
