Run Flat Indicator: Operation

The Run Flat Indicator (RPA) is initialized using the following control elements:

RPA button
On-board computer button on turn-signal/main-beam switch
With iDrive in the Central Information Display (CID) with the controller

IMPORTANT: Always perform initialization immediately after correcting the tire pressure, especially if a tire is changed or the wheels are interchanged. Only check tire pressures when the tires are cold.

Set the tires to the correct pressure before performing initialization. During initialization, the set tire pressure is taken as the initial value for the current set of wheels.

Correct the tire pressures when the tires are cold to prevent the data recorded from being affected by temperature.

IMPORTANT: Responsibility resides with the driver at all times

Check tire pressures regularly, at least twice a month and before embarking on lengthy journeys. During initialization, the set tire pressure is taken as the initial value for the current set of tires.

Initialize the RPA in the following situations:

If tire pressure is changed
(tire pressure is corrected or reset)
If the position of the tires is changed (change of axles, wheels), even if the tire pressure is not changed
If a tire is changed or the wheels are interchanged
(e.g. old tires for new tires, summer tires for winter tires, etc.)

Start initialization as follows:
Terminal 15 ON
(engine OFF or ON, do not pull away)
Vehicles with RPA button
- Press and hold the RPA button until the RPA indicator and warning light lights up yellow for a few seconds
Vehicles with BC button (on-board computer function)
- In the on-board computer function select "RPA" and "INIT" (LCD display) with the rocker switch on the turn signal/main-beam switch. Press the BC button to confirm.
- Press and hold the BC button for approx. 5 seconds, until a box with a tick appears behind the "INIT" display.
  > R56:
- In the on-board computer function select "SET/INFO" (LCD display in auxiliary instrument) with the BC button on the turn-signal/main-beam switch.
- Press and hold the BC button until the display changes
- Press the BC button repeatedly until the corresponding symbol and the word "RESET" are displayed.
- Press and hold the BC button until a square with a tick appears.
Vehicles with Central Information Display
Initialization is performed via the Central Information Display (CID) and controller.
- Select "RPA" in the "Settings" menu and confirm.
- Select "Set" and confirm.
Drive off

The end of the initialization phase is not indicated.