The TPMS system in the C Series functions similarly to the A Series, but there are some nuances due to model variations. If you’re seeing a “Tire Pressure Sensor Fault” message, it could be due to:
- Low or Unbalanced Tire Pressure: Sudden temperature changes or a slow puncture could trigger the sensor.
- Aging or Malfunctioning TPMS Sensors: After several years, TPMS sensors may degrade, causing inconsistent readings.
- Sensor Battery Depletion: The built-in battery in the TPMS sensor has a lifespan of about 5-7 years.
- Recent Tire Change or Rotation: If tires were recently changed, a manual reset of the system might be necessary to recalibrate.
- Software Glitches: The system might require an update to fix any bugs.
Steps to Fix the Tire Pressure Sensor Fault in a Mercedes-Benz C Series
- Check the Tire Pressure:
- Start by ensuring all tires are properly inflated according to the manufacturer’s specifications. You can usually find the correct pressure values on a sticker inside the driver’s door or in the owner’s manual.
- Inflate or deflate as necessary.
- Reset the TPMS System:
- Turn the ignition on but don’t start the car.
- On the C Series dashboard, use the controls on the steering wheel to navigate through the menu.
- Find the “Service” option, then select “Tire Pressure”.
- Click “Restart”, and follow the prompts to confirm.
- Drive the car for a short while so the system can recalibrate.
- Inspect the Sensors:
- If the reset doesn’t resolve the issue, the sensor itself might be faulty or the battery could be dead.
- Visit a Mercedes-Benz service center or tire shop to check if any TPMS sensors need to be replaced.
- Software Update:
- In some cases, the issue could be software-related, especially if you’ve had no physical issues with the tires or sensors. Ask your dealer if there’s a firmware update for your system.
- Professional Diagnosis:
- If you’re unable to resolve the problem yourself, a professional diagnostic will identify whether the issue is with the sensor, the control module, or a software glitch.
Preventing Future Tire Pressure Sensor Issues
- Regular tire checks: Especially before long trips or seasonal temperature changes.
- TPMS sensor replacement every 5-7 years or when changing tires.
- Ensure the system is properly reset after every tire rotation or change.