2017 Mercedes-Benz C300 Tire Pressure Warning Light Stays On

Resolve the Tire Pressure Warning Light in Your 2017 Mercedes-Benz C300

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Reviewed by
Aisha
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 2017 Mercedes-Benz C300 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 2017 Mercedes-Benz C300 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 2017 Mercedes-Benz C300?

When diagnosing the tire pressure warning light issue in your 2017 Mercedes-Benz C300, it's essential to adopt a systematic approach that begins with the simplest solutions. Start by manually checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring that the readings align with the manufacturer's recommended levels found in your owner's manual or on the sticker located inside the driver's door jamb. Next, visually inspect each tire for any signs of damage, such as punctures, cuts, or bulges, as these can lead to pressure loss and trigger the warning light. If the tire pressure is correct and no visible damage is found, consider resetting the tire pressure monitoring system (TPMS) according to the instructions in your vehicle's manual, as sometimes the system may require a reset to function properly. If the warning light remains illuminated, it may indicate a faulty tire pressure sensor, which would necessitate a visit to a mechanic equipped with specialized diagnostic tools to identify and replace any malfunctioning components. By following this diagnostic approach, you can effectively troubleshoot the issue and determine whether a simple fix or professional assistance is needed.

What could cause the tire pressure warning light to stay on in a 2017 Mercedes-Benz C300?

When the tire pressure warning light remains on in your 2017 Mercedes-Benz C300, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the primary culprits is low tire pressure, which is easily checked with a tire pressure gauge. Ensure all tires are inflated to the manufacturer's recommended levels, as even a slight deficiency can trigger the warning light. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor; these sensors can wear out over time and may require replacement. Additionally, sensor calibration issues can arise, particularly if tires have been recently changed or rotated, necessitating a recalibration to ensure accurate readings. Electrical faults within the tire pressure monitoring system can also lead to persistent warning lights, which may require professional diagnosis. Lastly, a simple system reset might resolve the issue, and this can often be performed through the vehicle's onboard computer. If these steps do not alleviate the problem, consulting a certified mechanic is advisable to identify and rectify any underlying issues.

What immediate steps should be taken to address the tire pressure warning light that remains on in a 2017 Mercedes-Benz C300?

When the tire pressure warning light remains illuminated in your 2017 Mercedes-Benz C300, it is crucial to act promptly to avoid potential safety hazards and costly repairs. Start by checking the tire pressure in all tires, including the spare, using a reliable tire pressure gauge. Ensuring that each tire is inflated to the manufacturer's recommended levels is essential, as underinflated tires can lead to poor handling, increased tire wear, and even blowouts. If you find any tires lacking proper pressure, inflate them accordingly. Next, inspect each tire for visible damage such as punctures or bulges, as these issues can compromise your safety on the road. After addressing any pressure discrepancies or damage, reset the Tire Pressure Monitoring System (TPMS) following the instructions in your owner's manual. If the warning light persists despite these efforts, it is vital to seek professional assistance, as ignoring the issue could lead to more severe problems with the TPMS or tires, ultimately jeopardizing your vehicle's performance and your safety. Taking these immediate steps not only helps in resolving the warning light but also ensures a safer driving experience.

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