Turn the auxiliary key toward the front to lock, toward the back to unlock.
To lock
All doors lock automatically when the driver's door is locked using the auxiliary key.
To unlock
The driver’s door unlocks when the auxiliary key is turned briefly to the unlock position and then immediately returned to the center position.
All doors unlock when the driver's door is unlocked and the auxiliary key is held in the unlock position for one second or longer.

Door Locks
Locking, Unlocking with Request Switch, Door Handle (With the advanced keyless
function)Mazda 6 Owners Manual: Exterior Care
The paintwork on your Mazda represents the latest technical developments in composition
and methods of application.
Environmental hazards, however, can harm the paint's protective properties, if
proper care is not taken.
Here are some examples of possible damage, with tips on how to prevent th ...
Mazda 6 Owners Manual: Heating
1. Set the mode selector dial to the
position.
2. Set the air intake selector to the outside air position (indicator light turns
off).
3. Set the temperature control dial to the hot position.
4. Set the fan control dial to the desired speed.
5. If dehumidified heating is desired, turn on the ...