SOS button with emergency call LED

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The emergency call button with emergency call LED is directly connected to the TCB control unit basic version.

Triggering an emergency call:

Touch the covering flap of the emergency call button and open it.
Press the emergency call button until the emergency call LED lights up. The connection is established.
When the emergency call LED flashes, the connection has been established.

The manual emergency call can be cancelled within 5 seconds.

Fig 1: Identifying Roof Function Center, Emergency Call LED And Emergency Call Button

Courtesy of BMW OF NORTH AMERICA, INC.