2020 Mercedes-Benz S560 Tire Pressure Warning Light Stays On

Addressing Tire Pressure Warning Light in 2020 Mercedes-Benz S560

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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 2020 Mercedes-Benz S560 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 2020 Mercedes-Benz S560 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 persistent tire pressure warning light on a 2020 Mercedes-Benz S560?

To effectively diagnose a persistent tire pressure warning light on your 2020 Mercedes-Benz S560, start by checking the tire pressure in all four tires, ensuring they are inflated to the manufacturer's recommended levels. Low tire pressure is often the primary culprit behind such warnings. Next, visually inspect each tire for any signs of damage, such as punctures or bulges, which could lead to air loss. If the tires appear to be in good condition, attempt to reset the tire pressure monitoring system as outlined in your vehicle's manual; this can sometimes resolve the issue if it was triggered by a temporary fault. For accuracy, use a reliable tire pressure gauge to confirm the readings. Additionally, examine the valve stems for any leaks or damage that might be affecting tire pressure. If the warning light remains illuminated, consider using a diagnostic scanner to check for any fault codes related to the tire pressure monitoring system. Should these steps not resolve the issue, it may be time to consult a qualified mechanic or your dealership for a more thorough diagnosis and repair.

What could be causing the tire pressure warning light to stay on in a 2020 Mercedes-Benz S560?

When the tire pressure warning light stays on in your 2020 Mercedes-Benz S560, it’s essential to identify the underlying issues to ensure your safety and vehicle performance. The most frequent cause is low tire pressure, which can be easily checked with a tire pressure gauge; simply inflate any under-inflated tires to the recommended levels. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor, which may need recalibration or replacement. Additionally, the sensors are battery-operated and can fail over time, leading to persistent warning lights if the batteries are low or dead. Another factor to consider is the TPMS module itself, which might require a diagnostic scan to uncover any faults. Environmental conditions, such as drastic temperature changes, can also impact tire pressure readings, so adjusting your tire pressure accordingly is advisable. Lastly, inspect your tires for any leaks or punctures, as these can lead to gradual pressure loss and trigger the warning light. By addressing these common problems, you can effectively troubleshoot the tire pressure warning light issue in your vehicle.

What should I do if the tire pressure warning light stays on in my 2020 Mercedes-Benz S560?

When the tire pressure warning light stays illuminated in your 2020 Mercedes-Benz S560, it is essential to act quickly to ensure your safety and prevent further complications. Neglecting this warning can lead to dangerous driving conditions, including decreased traction and increased tire wear, which may ultimately result in a tire blowout or other serious accidents. Begin by checking the tire pressure in all four tires, including the spare, and make sure they are inflated to the manufacturer's recommended levels. If you discover any underinflated tires, inflate them to the correct pressure, as driving on low-pressure tires can severely impact handling and fuel efficiency. Additionally, inspect each tire for visible damage, such as punctures or bulges, which may necessitate repair or replacement. After addressing any pressure issues, you may need to reset the tire pressure monitoring system to turn off the warning light. If the light remains on despite your efforts, it is wise to seek assistance from a qualified mechanic, as there could be a more significant issue with the monitoring system that requires professional attention. By taking these proactive steps, you not only enhance your safety on the road but also contribute to the overall health and longevity of your vehicle.

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