Just like in other Mercedes models, the TPMS in the S Series helps monitor tire pressure and alerts you when something’s off. However, sometimes the system might show a “Tire Pressure Sensor Fault” for several reasons:
- Low Tire Pressure: Even minor fluctuations in tire pressure can trigger the alert.
- TPMS Sensor Malfunction: The sensors may fail due to damage or wear over time, especially in older vehicles.
- Sensor Battery Life: The small batteries in the TPMS sensors usually last 5-7 years and need replacement after that.
- Improper Reset: If you’ve recently changed or rotated your tires, the system may not recalibrate automatically and will need a manual reset.
- Software Issues: Occasionally, system bugs can cause false alerts, which may require a software update.
How to Fix Tire Pressure Sensor Fault in Mercedes-Benz S Series
- Check Tire Pressure:
- Ensure all four tires are properly inflated. You can find the recommended pressure levels in the owner’s manual or on a sticker inside the driver’s door.
- Adjust the pressure as needed, especially if the weather has changed recently.
- Reset the TPMS System:
- Turn the ignition on without starting the engine.
- Use the steering wheel controls to access the “Service” menu on the digital dashboard.
- Select “Tire Pressure”, then choose “Restart”.
- Confirm the reset and drive for a few minutes to allow the system to recalibrate.
- Check TPMS Sensors:
- If the warning persists, a sensor may be faulty or the battery may be depleted.
- A Mercedes-Benz service center can check and replace any damaged or non-functional sensors.
- Perform a Software Update:
- In some cases, a software update might be needed to resolve the issue. Contact your dealership to check if there are any available updates.
- Visit a Professional:
- If all else fails, professional diagnostics will help identify the root cause of the issue, whether it’s hardware or software-related.
Preventing Future Tire Pressure Sensor Faults
- Regularly check tire pressure, especially before long trips or after seasonal changes.
- Replace TPMS sensors every 5-7 years or when changing tires.
- Always ensure the system is reset after tire maintenance.