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Mercedes Benz C-Class: Tire Pressure Monitoring System

Among the most advanced tire pressure monitoring systems (TPMS) in modern vehicles, the Mercedes Benz C-Class tires practically inflate themselves. Continue reading to learn more about the TPMS feature in your w205.

By Charlie Gaston - April 28, 2015

This article applies to the Mercedes-Benz C-Class C300/C400 w205 (2014-Present).

As a responsible driver, it's important for you to monitor the tire pressure in your Mercedes-Benz C-Class. The reasons why are simple: low pressure results in less friction between your vehicle's tires and the road, leading to a decline in fuel economy, poor handling, and increased tread wear. In almost all vehicles, low tire pressure triggers the warning lights on the instrument panel, signaling that the tires require servicing or replacement. However, sometimes this warning may be a bit too late. By relying on the tire pressure monitoring system (TPMS) in your w205, you can avoid these problems way ahead of time.

Changes in Tire Pressure

Tires loose pressure for a number of reasons, including (but not limited to) fluctuations in outside temperature. This is true of seasonal changes and temporary ambient conditions, such as a temperature increase inside your garage. Check the tire pressure of your w205 regularly using a gauge, and pay attention to the tire pressure monitoring system (TPMS). This system translates the inflation pressure of your vehicle's tires into data, so you can easily determine whether tire pressures are below or at their optimum PSI.

Tire Pressure Monitoring System

To access your vehicle's TPMS, press the left or right arrow button on your steering wheel console. Once you have reached the service menu, press the up or down arrow button until you reach the tire pressure menu. Then, click "OK" to display the tire pressures of all four wheels.

Figure 1. TPMS display on your instrument cluster.

Optimum Tire Pressures

Look to the inside of your vehicle's fuel filler door for the recommended tire pressures. There you will find your vehicle's tire sizes, tire loading information, and inflation pressures. If one or more tires are above or below the recommended PSI, a warning light will illuminate on your vehicle's dashboard. This warning light notifies you of the specific tire(s) with inexact inflation pressure(s). In addition to the information in Figure 2, here are additional Mercedes-Benz tire recommendations:

  • For 18" tires, the recommended PSI is 39/45.
  • For 19" tires, the recommended PSI is 36/45.
  • Run-flats should only be used on vehicles equipped with a tire pressure monitoring system.
  • In the winter, tires should be four to five PSI higher than in the summer.

However, keep in mind that tire pressure recommendations are merely an estimate. Make adjustments as needed based on the particular brand of tires used, the construction of those particular tires, and your vehicle's normal load.

Figure 2. Recommended tire pressures located on fuel filler door.

Scheduled Maintenance

Have your tires rotated every 10,000 miles. If you notice unusual wear, visit a Mercedes-Benz service center or certified automotive mechanic for service and tread wear inspections.

Common Questions

Does the Tire Pressure Warning Lamp Always Indicate a Low Tire?

No. If your vehicle's warning light illuminates, the tire may be just below or above the recommended PSI, but not enough to cause a marked difference. However, check your tire(s) using a tire gauge, and add air as needed.

Will the TPMS Automatically Reset?

After adding air to your vehicle's tires, drive for a short while. The display should reset automatically, showing your vehicle's newly adjusted tire pressure levels. If not, check that your tires have sufficient air pressure, and then follow the prompts to reset the monitoring system manually.

What Should I Do If My Tire Goes Flat?

Call 1-800-FOR-MERCEDES (1-800-367-6372). The Mercedes-Benz specialist will direct you on how to properly replace the tire, and reset the TPMS.

What is The Cost For Tire Rotation?

If your C-Class is under Mercedes-Benz service coverage, the cost for a tire rotation is included. Simply take your car to a local service station to have the tires rated. Generally, outside automotive mechanics quote between $20 and $40. Tire rotations should run no longer than 30 minutes to an hour.

Common Issues

Warming Lamp Won't Go Off

Reset your vehicle's TPMS, and then drive for several minutes to allow the system to reset. If the warning lamp still does not turn off, refer to your owner's manual for additional recommendations, or take your w205 to a service center to have it inspected.

Tire and Load Information is Missing

Figure 2 (above) provides the recommended tire and load information. However, you can also refer to the owner's manual, MBUSA.com, or you can contact your local Mercedes-Benz dealership for information.

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