See also:

Horn
Audible warning system to alert other road users to an imminent danger. Press the central part of the multifunction steering wheel. Use the horn moderately and only in the following circumstances: ...

Secondary control
For mechanically locking and unlocking the doors in the event of a fault with the central locking system or a battery failure. ...

Service overdue
For 5 seconds after the ignition is switched on, the spanner fl ashes to indicate that the service must be carried out as soon as possible. Example: the service is overdue by 186 miles (300 km). F ...