Mercedes-Benz C-Class (W205) 2015 - 2021 Owners Manual: Tire pressure monitoring system

Function of the tire pressure monitoring system

The system checks the tire pressure and the tire temperature of the tires installed on the vehicle by means of a tire pressure sensor.

New tire pressure sensors, e.g. in winter tires, are automatically taught-in during the first journey they are used.

The tire pressure and the tire temperature appear in the multifunction display.

If there is a substantial pressure loss or if the tire temperature is excessive, you will be warned in the following ways:

• via display messages.
• via the warning lamp in the instrument cluster.

The tire pressure monitoring system is only an aid. It is the driver's responsibility to set the tire pressure to the recommended cold tire pressure suitable for the operating situation. Set the tire pressure for cold tires using a tire pressure gauge. Note that the correct tire pressure for the current operating situation must first be taught-in to the tire pressure monitoring system.

In most cases, the tire pressure monitoring system will automatically update the new reference values after you have changed the tire pressure.

You can, however, also update the reference values by restarting the tire pressure monitoring system manually.

System limitations

The system may be impaired or may not function in the following situations:

• If the tire pressure is set incorrectly
• If there is a sudden pressure loss caused, for example, by a foreign object penetrating the tire
• If there is a malfunction caused by another radio signal source

Make sure to observe the following further related subject:

• Notes on tire pressure.

Checking the tire pressure with the tire pressure monitoring system

Requirements:

• The ignition is switched on.

On-board computer: Service → Tires

One of the following displays appears:

• Current tire pressure and tire temperature of the individual wheels:

• Tire pressure will be displayed after driving a few minutes
• Tire Pressure Monitor Active: the teach-in process of the system is not yet complete.

  The tire pressures are already being monitored.

• Compare the tire pressure with the recommended tire pressure for the current operating condition. Observe the notes on tire temperature.

The values displayed in the multifunction display may deviate from those of the tire pressure gauge as they refer to sea level. At high altitudes, the tire pressure value indicated by a pressure gauge are higher than those shown by the on-board computer. In this case, do not reduce the tire pressure.

Make sure to observe the following further related subject:

• Notes on tire pressure.

Restarting the tire pressure monitoring system

Requirements:

• The recommended tire pressure is correctly set for the respective operating status on each of the four wheels.

Restart the tire pressure monitoring system in the following situations:

• The tire pressure has changed.
• The wheels or tires have been changed or newly installed.

On-board computer: Service → Tires

• Swipe downwards on Touch Control on the left-hand side of the steering wheel.

  The Use Current Pressures as New Reference Values? message is shown in the multifunction display.

• To begin restart, press Touch Control on the left-hand side of the steering wheel.

  The Tire Press. Monitor Restarted message is shown in the multifunction display.

  Current warning messages are deleted and the yellow warning lamp goes out.

  After you have been driving for a few minutes, the system checks whether the current tire pressures are within the specified range. The current tire pressures are then accepted as reference values and monitored.

Make sure to observe the following further related subject:

• Notes on tire pressure.

Radio equipment approval of the tire pressure monitoring system

Radio equipment approval numbers

Further information on the declaration of conformity for wireless vehicle components.