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: ...

Operating fault
With the ignition on, if this warning lamp comes on and AUTO flashes, accompanied by an audible signal and a message in the screen, this indicates a gearbox fault. Have it checked by a PEUGEOT d ...

With manual air conditioning
Put the temperature and distribution controls to the dedicated marked position. Switch on the air conditioning by pressing the "A/C" button; the warning lamp in the button comes on. ...