RPA Warning System

The RPA system has three ways of resetting/initialization dependent on the model/interface. (RPA initialization means "teaching the system the tire pressures".)

- RPA button >E46,E53,E83,E85
The RPA button only needed for initializing the RPA.

- CID: Central Information Display
Vehicles that are equipped with CID are initialized using the CID.

- On-board button and rocker switch on direction indicator/high beam stalk > E87, E90, E91
Initialization is performed on the LC display, using the BC button and the rocker switch on the turn-signal/main-beam switch. The on-board computer functions are selected with the rocker switch.

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.

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" (LC 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.

- 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.

Preconditions for activation
The flat tire indicator (RPA) is automatically activated when terminal 15 is switched ON. The RPA cannot be switched off manually.