2018 Mercedes-Benz GLS63 AMG Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2018 Mercedes-Benz GLS63 AMG for Optimal Performance

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Tire Leaking Air
0%
30% chance it's the
Wheel Leaking Air
0%
15% chance it's the
Tire Pressure Monitoring System
0%
15% chance it's
Something else
The most common reasons a 2018 Mercedes-Benz GLS63 AMG tire pressure warning light stays on are a leaking tire, a wheel that no longer holds air, or a faulty tire pressure monitoring system.
  • Tire Leaking Air: A puncture, valve stem issue, or rim damage can cause a tire to leak air, leading to loss of pressure.
  • Wheel Leaking Air: A puncture or damage to the tire or rim can cause air to leak, resulting in a loss of tire pressure.
  • Tire Pressure Monitoring System: A malfunctioning tire pressure monitoring system can be caused by faulty sensors or a dead battery in the sensor units.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2018 Mercedes-Benz GLS63 AMG tire pressure warning light stays on?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When a tire pressure monitoring sensor fails, the tire pressure monitoring system control module will recognize a loss in communication and turn on the warning lamp which indicates the failure. This is most often the case. However, the tire pressure monitoring sensor may also fail by reporting incorrect tire pressures. This could cause a flat tire to go unrecognized, or a properly inflated tire to signal a low or high tire pressure warning.

When a relearn is needed, for any reason, the TPMS warning light will illuminate, and many vehicles will display a message relating to the TPMS system being inoperative or loosing communication. It is important to keep a watchful eye on tire pressures when this system is having issues because there is no warning available for underinflation or overinflation of the tires.

Wheels offer very few symptoms, but these symptoms should never be ignored. Visible cracks on the wheels may appear, especially after hitting a large bump, Most often, this will also be accompanied by loss of air from the tire on that wheel. Also, vibration in the steering wheel is very common when the tire is out of balance, and improper wheel nuts or bolts can cause creaking and popping noises to develop. Again, there are very few symptoms, but they should not be ignored.

The only symptoms of a TPMS control module failure are failing to alert the driver of underinflation or overinflation of one or more tires, failure to communicate with the body control module or TPMS sensors, or erroneously reporting incorrect tire pressure.

The only symptoms requiring diagnosis for the tire pressure monitoring system warning lamp is if the warning lamp has illuminated while the tires have correct air pressure, or if the air pressure for the tires is out of specification and the warning lamp is off. This is because the overwhelming majority of cases where the TPMS lamp illuminates is due to the change in ambient temperature.

What are the initial steps to diagnose a tire pressure warning light that stays on in a 2018 Mercedes-Benz GLS63 AMG?

When faced with a tire pressure warning light that remains illuminated in your 2018 Mercedes-Benz GLS63 AMG, the first step is to check the tire pressure across all four tires. Ensure they are inflated to the manufacturer's recommended levels, as low pressure is a frequent culprit for such warnings. Next, visually inspect each tire for any signs of damage, including punctures, cuts, or bulges, which could indicate a loss of air. If the tires appear to be in good condition, consider resetting the tire pressure monitoring system by following the instructions in your vehicle's manual; this can often clear false alerts. Additionally, examine the tire pressure monitoring sensors on each wheel to confirm they are functioning properly and free from damage. If, after these steps, the warning light continues to persist, it may be time to consult a professional mechanic or an authorized Mercedes-Benz service center for a thorough diagnosis and repair. By systematically addressing these areas, you can effectively troubleshoot the issue and potentially resolve the warning light concern.

What could be causing the tire pressure warning light to stay on in a 2018 Mercedes-Benz GLS63 AMG?

When the tire pressure warning light stays on in a 2018 Mercedes-Benz GLS63 AMG, it can indicate several underlying issues that DIY enthusiasts should be aware of. The most frequent cause is low tire pressure, which can result from natural air loss or punctures; therefore, regularly checking and inflating tires to the recommended levels is essential for safety and performance. Another common problem is a faulty tire pressure sensor, which may fail to provide accurate readings, keeping the warning light illuminated. Additionally, the batteries in these sensors have a limited lifespan and may need replacement to ensure they function correctly. If the sensors are operational but still trigger the warning light, recalibrating them might be necessary, as they can sometimes lose their ability to accurately monitor tire pressure. Lastly, a malfunction within the tire pressure monitoring system itself could be the reason for the persistent warning light, which may require professional diagnosis and repair. By understanding these potential issues, DIYers can take proactive steps to troubleshoot and resolve the problem, ensuring their vehicle remains safe and efficient on the road.

What immediate actions should be taken if the tire pressure warning light remains on in a 2018 Mercedes-Benz GLS63 AMG?

When the tire pressure warning light remains illuminated in your 2018 Mercedes-Benz GLS63 AMG, it is crucial to act swiftly to avoid safety hazards and potential vehicle damage. Ignoring this warning can lead to compromised handling, increased tire wear, and even blowouts, which pose serious risks on the road. Start by checking the tire pressure in all four tires with a reliable gauge, ensuring they meet the manufacturer's specifications. If you find any tires underinflated, use a quality air compressor to inflate them to the correct levels. Additionally, visually inspect each tire for any signs of damage, such as punctures or bulges, as these can also trigger the warning light. Once you have addressed any pressure discrepancies or damage, reset the tire pressure monitoring system according to your owner's manual. If the warning light persists despite these efforts, it is essential to consult a qualified mechanic or an authorized Mercedes-Benz service center to diagnose any underlying issues. Taking these immediate actions not only enhances your safety but also helps maintain the performance and longevity of your vehicle.

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