See also:

Seat Belt Warning Light/Beep
The seat belt warning light illuminates and a beep sound will be heard if the driver's seat belt is not fastened when the ignition switch is turned to the ON position. Conditions of operation ...

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

AUX Mode (Auxiliary input)
You can connect portable audio units or similar products on the market to the auxiliary jack to listen to music or audio over the vehicle's speakers. To use the auxiliary jack, pull up its cover. ...