Understanding the Tyre Pressure Warning Light

The tyre pressure warning light in your Mercedes-Benz is a crucial safety feature that alerts you when one or more of your tyres has low air pressure. This light typically appears as a yellow exclamation mark inside a tyre symbol on your dashboard. When this light illuminates, it's essential to address the issue promptly to ensure optimal vehicle performance and safety.

Checking Tyre Pressure

Before resetting the warning light, it's crucial to check and adjust your tyre pressures:

  • Locate the tyre pressure information sticker, usually found inside the fuel filler flap or on the driver's door frame.
  • Use a reliable tyre pressure gauge to check all four tyres, including the spare if applicable.
  • Inflate or deflate tyres as necessary to match the recommended pressures.

Remember: Tyre pressures should be checked when the tyres are cold for accurate readings.

Resetting the Tyre Pressure Warning Light

Once you've adjusted the tyre pressures, follow these steps to reset the warning light:

For Mercedes Models with MBUX System (2018 and newer):

1. Start the engine and ensure the car is stationary.

2. Press the Home button on the steering wheel.

3. Use the touchpad to scroll to "Service" and select it.

4. Navigate to "Tyres" and select it.

5. Choose "Restart tyre pressure monitor" or similar option.

6. Confirm the reset when prompted.

For Older Mercedes Models:

1. Turn the ignition on without starting the engine.

2. Press the steering wheel buttons to navigate to the Service menu in the instrument cluster.

3. Scroll to find "Tyre Pressure" and select it.

4. Choose the reset option and confirm.

After Resetting

After resetting the system, you may need to drive the vehicle for a short distance (typically above 20 mph) for the TPMS to recalibrate fully. The warning light should turn off after this process.

Troubleshooting

If the warning light persists after resetting:

  • Double-check all tyre pressures, including the spare.
  • Ensure you've followed the reset procedure correctly.
  • Consider potential sensor issues if the problem continues.

Important: If you're unsure about any step in the process, consult your vehicle's manual or contact a Mercedes-Benz service center for assistance.

FAQs About Mercedes Tyre Pressure Warning Light

    • How often should I check my tyre pressures?
      It's recommended to check tyre pressures at least once a month and before long trips.
    • Can temperature changes trigger the warning light?
      Yes, significant temperature drops can cause tyre pressure to decrease, potentially triggering the warning light.
    • What if the light comes on frequently after resetting?
      Frequent warnings may indicate a slow leak or faulty TPMS sensor. Have your vehicle inspected by a professional.

By following these steps, you can effectively reset the tyre pressure warning light on your Mercedes-Benz and ensure your tyres are properly maintained for safe driving.