See also:

When Warning Indicator/Beep is Activated
Under the following conditions, warning beeps are heard and a warning/indicator light in the instrument cluster illuminates to notify the driver of improper operation of the advanced key to pr ...

Horn
To sound the horn, press the mark on the steering wheel. ...

Trailer Towing
The Mazda3 is not designed for towing. Never tow a trailer with your Mazda3. ...