How to Reset and Relearn the TPMS of Mercedes-Benz GLS in All Generations

How to Reset and Relearn the TPMS of Mercedes-Benz GLS in All Generations

Mercedes-Benz GLS TPMS reset and relearn guide for all generations ensures optimal tire pressure monitoring and vehicle safety. Learn step-by-step procedures for 2020-present, 2017-2019, and 2013-2016 models to maintain tire longevity and fuel efficiency. Discover troubleshooting tips and best practices for effective TPMS maintenance.

The Tire Pressure Monitoring System (TPMS) is a crucial safety feature in modern vehicles, including the Mercedes-Benz GLS. This system helps drivers maintain optimal tire pressure, ensuring better fuel efficiency, handling, and tire longevity. In this comprehensive guide, we’ll explore how to reset and relearn the TPMS for all generations of the Mercedes-Benz GLS, providing you with the knowledge to maintain your vehicle’s safety and performance.

Understanding TPMS in Mercedes-Benz GLS

Before diving into the reset and relearn procedures, it’s essential to understand what TPMS is and how it functions in the Mercedes-Benz GLS.

What is TPMS?

The Tire Pressure Monitoring System is an electronic system designed to monitor the air pressure inside pneumatic tires. It reports real-time tire pressure information to the driver of the vehicle, usually through a gauge or a pictogram display on the dashboard.

How TPMS Works in Mercedes-Benz GLS

In Mercedes-Benz GLS models, the TPMS uses sensors located in each wheel to measure tire pressure. These sensors transmit data to the vehicle’s computer system, which then displays the information on the dashboard. If the pressure in one or more tires falls below the recommended level, the system alerts the driver through a warning light or message.

Importance of Proper TPMS Functioning

Maintaining a properly functioning TPMS is crucial for several reasons:

• Safety: Correct tire pressure ensures optimal vehicle handling and reduces the risk of tire blowouts.
• Fuel Efficiency: Properly inflated tires can improve fuel economy by reducing rolling resistance.
• Tire Longevity: Correct tire pressure helps distribute wear evenly, extending the life of your tires.
• Performance: Optimal tire pressure contributes to better overall vehicle performance and comfort.

When to Reset or Relearn TPMS

There are several situations when you might need to reset or relearn the TPMS in your Mercedes-Benz GLS:

1. After rotating tires
2. When replacing one or more tires
3. After changing a TPMS sensor
4. When the TPMS warning light remains on even after properly inflating all tires
5. Following a software update or battery disconnection

TPMS Reset and Relearn Procedures for Mercedes-Benz GLS

The exact procedure for resetting and relearning the TPMS may vary slightly depending on the generation and model year of your Mercedes-Benz GLS. However, the general steps remain similar across most models. We’ll cover the procedures for different generations, starting with the most recent.

Latest Generation Mercedes-Benz GLS (2020-Present)

For the latest generation of the Mercedes-Benz GLS, the TPMS reset procedure is relatively straightforward:

1. Ensure all tires are properly inflated to the recommended pressure.
2. Turn on the ignition without starting the engine.
3. Press the Home button on the steering wheel.
4. Use the touch-sensitive button on the steering wheel to scroll right and find the “Service” menu.
5. Hold the touch-sensitive button for three seconds until the tire pressure light blinks.
6. Wait for about 20 minutes for the sensor to fully reset.

After completing these steps, take your GLS for a drive at speeds above 50 mph for about 10 minutes. This allows the system to relearn and calibrate the new tire pressures.

Second Generation Mercedes-Benz GLS (2017-2019)

For the second generation GLS, the process is similar but uses the COMAND infotainment system:

1. Ensure all tires are properly inflated.
2. Turn the ignition to the “on” position without starting the engine.
3. Press the Menu button on the steering wheel.
4. Use the arrow buttons to navigate to “Service” in the instrument cluster display.
5. Press “OK” to enter the Service menu.
6. Select “Tire Pressure” and press “OK”.
7. Choose “Restart Tire Pressure Monitor” and confirm by pressing “OK”.
8. The message “Tire Pressure Monitor Restarted” should appear.

After this, drive the vehicle for about 10 minutes at speeds over 30 mph to allow the system to relearn the new tire pressures.

First Generation Mercedes-Benz GLS (2013-2016)

The first generation GLS (which was actually called the GL-Class before being renamed) follows a similar procedure:

1. Ensure all tires are properly inflated.
2. Turn the ignition to the “on” position.
3. Press the Menu button on the steering wheel.
4. Navigate to “Service” using the arrow buttons.
5. Select “Tire Pressure” and press “OK”.
6. Choose “Use Current Pressures as New Reference Values” and confirm.
7. The message “Tire Pressure Monitor Restarted” should appear.

As with other generations, drive the vehicle for about 10-15 minutes at highway speeds to complete the relearning process.

Troubleshooting TPMS Issues in Mercedes-Benz GLS

Even after following the reset and relearn procedures, you might encounter some issues with your TPMS. Here are some common problems and their potential solutions:

TPMS Light Stays On

If the TPMS warning light remains illuminated after resetting:

• Double-check that all tires, including the spare, are properly inflated.
• Ensure you’ve driven the vehicle for at least 10 minutes at highway speeds after resetting.
• Check for any visible damage to the tire or wheel that might be causing a slow leak.
• Consider having the TPMS sensors checked for battery life or malfunction.

Inconsistent Pressure Readings

If you notice inconsistent or fluctuating pressure readings:

• Remember that tire pressure can change with temperature fluctuations. Check pressures when tires are cold for the most accurate readings.
• Ensure the TPMS sensors are properly installed and not damaged.
• Consider having the sensors recalibrated by a professional.

System Failure Messages

If you receive system failure messages:

• Check for any software updates for your vehicle’s infotainment system.
• Disconnect and reconnect the vehicle’s battery to reset the system.
• If problems persist, have the TPMS diagnosed by a certified Mercedes-Benz technician.

Best Practices for TPMS Maintenance

To ensure your Mercedes-Benz GLS’s TPMS functions optimally, consider these best practices:

Regular Tire Pressure Checks

While the TPMS is a valuable tool, it’s not a substitute for regular manual tire pressure checks. Make it a habit to check your tire pressures at least once a month, preferably when the tires are cold.

Proper Inflation

Always inflate your tires to the manufacturer’s recommended pressure. This information can typically be found on a placard inside the driver’s side door jamb or in your owner’s manual.

Seasonal Considerations

Remember that tire pressure can fluctuate with temperature changes. You may need to adjust tire pressures as seasons change, especially when transitioning from summer to winter or vice versa.

Professional Inspections

Have your TPMS inspected by a professional during regular service intervals. They can check for sensor battery life and ensure all components are functioning correctly.

Understanding TPMS Sensor Technology

The TPMS in your Mercedes-Benz GLS relies on sophisticated sensor technology. Understanding this technology can help you better maintain your system.

Direct vs. Indirect TPMS

Mercedes-Benz GLS models typically use a direct TPMS, which means each wheel has its own pressure sensor. This is in contrast to indirect systems that use the ABS to detect differences in wheel rotation speeds to infer pressure changes.

Sensor Battery Life

TPMS sensors are powered by batteries that typically last between 5-10 years. When these batteries die, the sensors will need to be replaced. This is often why older vehicles may experience TPMS issues.

Sensor Compatibility

If you need to replace a TPMS sensor, ensure you use one that’s compatible with your specific GLS model. Using the wrong sensor can lead to system malfunctions or inaccurate readings.

The Impact of Tire Changes on TPMS

Changing tires can have a significant impact on your TPMS, and it’s important to understand how to handle these situations.

Tire Rotation

When rotating tires, the TPMS may need to be reset to recognize the new positions of the sensors. Always follow the reset procedure after rotating tires.

New Tire Installation

When installing new tires, ensure that the TPMS sensors are either transferred from the old tires or that new sensors are installed. After installation, the system will need to be reset and relearned.

Winter Tires

If you switch to winter tires, you may need a second set of TPMS sensors. Some drivers choose to have a complete set of winter wheels with their own sensors to simplify the seasonal change.

Legal Requirements and TPMS

It’s important to understand that TPMS is not just a convenience feature, but a legal requirement in many jurisdictions.

TPMS Legislation

In the United States, the TREAD Act mandates that all vehicles manufactured after September 1, 2007, be equipped with a TPMS. Similar legislation exists in many other countries.

Implications of Disabling TPMS

Given the legal requirements, it’s important to note that disabling your TPMS is not only unsafe but may also be illegal. Always ensure your system is functioning properly.

Future of TPMS Technology

As automotive technology continues to advance, so does TPMS technology. Here’s a glimpse into what the future might hold:

Integration with Other Systems

Future TPMS may be more closely integrated with other vehicle systems, providing more comprehensive data about tire health and performance.

Predictive Maintenance

Advanced AI and machine learning could allow TPMS to predict potential tire issues before they occur, enhancing safety and convenience.

Wireless Charging

Some manufacturers are exploring wireless charging technologies for TPMS sensors, which could significantly extend their lifespan.

Conclusion

Understanding how to reset and relearn the TPMS in your Mercedes-Benz GLS is an essential skill for any owner. By following the procedures outlined in this guide, you can ensure that your vehicle’s TPMS is functioning correctly, providing you with accurate tire pressure information and enhancing your safety on the road.

Remember, while the TPMS is a valuable tool, it’s not a replacement for regular tire maintenance. Always perform visual inspections of your tires and check pressures manually on a regular basis. By combining the benefits of your TPMS with good tire maintenance practices, you can ensure optimal performance, safety, and longevity for your Mercedes-Benz GLS.

Whether you’re dealing with the latest GLS model or an older generation, the principles of TPMS care remain the same. Stay informed, stay proactive, and enjoy the peace of mind that comes with properly maintained tires and a fully functional TPMS.

By mastering the TPMS reset and relearn procedures for your Mercedes-Benz GLS, you’re taking an important step in maintaining your vehicle’s safety and performance. Remember, when in doubt, always consult your vehicle’s manual or seek assistance from a certified Mercedes-Benz technician. Safe driving!