2015 Mercedes-Benz CLS550 Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2015 Mercedes-Benz CLS550 for Safe Driving

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Reviewed by
Devin Cabugcal
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 2015 Mercedes-Benz CLS550 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 2015 Mercedes-Benz CLS550 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 steps should I take to diagnose the tire pressure warning light issue in my 2015 Mercedes-Benz CLS550?

To effectively diagnose the tire pressure warning light issue in your 2015 Mercedes-Benz CLS550, begin with a straightforward approach that prioritizes simpler solutions before delving into more complex diagnostics. Start by manually checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring that each tire is inflated to the manufacturer's recommended levels, which can typically be found on a sticker inside the driver's door jamb or in the owner's manual. Next, inspect the tires for any visible damage, such as punctures, cuts, or bulges, as these can lead to pressure loss. If the tire pressure is correct and the tires appear undamaged, consider resetting the tire pressure monitoring system (TPMS) according to the instructions in your vehicle's manual, as this can sometimes resolve false warnings. If the warning light remains illuminated, it may indicate a faulty tire pressure sensor, which would require diagnostic tools to identify the malfunctioning component. Should these steps not yield results, it is advisable to consult a certified mechanic or dealership for a thorough inspection and repair, ensuring your vehicle's safety and performance.

What could be causing the tire pressure warning light to stay on in a 2015 Mercedes-Benz CLS550?

When the tire pressure warning light stays on in your 2015 Mercedes-Benz CLS550, it’s essential to identify the underlying issues to ensure your safety and vehicle performance. One of the most frequent causes is low tire pressure, which can result from natural air loss or temperature fluctuations, particularly in colder months. Regularly checking and maintaining your tire pressure at the manufacturer’s recommended levels can often resolve this issue. If the tire pressure is adequate, consider the possibility of a faulty tire pressure sensor, which may need replacement if it fails to provide accurate readings. Additionally, sensor calibration issues can occur, requiring a recalibration to restore proper functionality. Electrical malfunctions within the tire pressure monitoring system can also lead to the warning light remaining illuminated, necessitating diagnostic testing to identify the specific problem. Lastly, inspect your tires for any signs of leaks or damage, as these can contribute to pressure loss and trigger the warning light. By systematically addressing these common problems, you can effectively troubleshoot and resolve the persistent tire pressure warning light in your vehicle.

How urgent is it to address the tire pressure warning light on my 2015 Mercedes-Benz CLS550?

Addressing the tire pressure warning light on your 2015 Mercedes-Benz CLS550 is not just a matter of convenience; it is a critical safety concern that requires immediate attention. Ignoring this warning can lead to serious consequences, including compromised vehicle handling and increased risk of accidents due to underinflated tires. Furthermore, driving with low tire pressure can significantly affect your fuel efficiency, leading to higher costs at the pump and potentially causing uneven tire wear that may necessitate early replacement. Additionally, neglecting this warning can impair your vehicle's traction control and stability systems, which are vital for safe driving, especially in adverse conditions. Therefore, it is essential to check your tire pressure as soon as the warning light illuminates, ensuring your safety and the longevity of your vehicle. Taking prompt action not only enhances your driving experience but also protects your investment in your Mercedes-Benz.

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2015 Mercedes-Benz CLS550 Tire Pressure Warning Light Fixes