Tire Pressure Monitor (TPM)
CAUTION:
The system is inactive and cannot display a flat tire if a wheel has been mounted without TPM electronics or if TPM experiences temporary interference from other systems or devices that use the same radio frequency.
When a flat tire is detected, the yellow TPMS warning lamp lights up, a message appears on the iDrive Control Display, and signal sounds. If a system malfunction occurs, the yellow warning light flashes and then lights up continuously. The tires are shown in gray on the Control Display and a message is displayed.
Status display on iDrive Control Display: The tire and system status is indicated by the color of the tires. TPM takes the fact that the tire pressure changes during driving into account. A correction is only required if the color of the TPM display indicates that it is necessary.
- Wheels are Green: The tire pressure matches the learned set state. "Status: TPM active" is displayed on the Control Display.
- One Wheel is Yellow: There is a flat tire or a major drop in inflation pressure in the indicated tire. A message appears on the Control Display.
- All Wheels are Yellow: There is a flat tire or a major drop in inflation pressure in several tires, system was not reset after a wheel change, or a flat tire in one or more tires while the system is being reset. A message appears on the Control Display.
- Wheels are Gray:
The system cannot detect a flat tire. Reasons for this can include:
- TPM is being reset.
- Temporary interference due to systems or devices that use the same radio frequency.
- System malfunction.