Mazda 6 Owners Manual: Fog Lights (Some models)
The fog lights can be turned on with the ignition switched ON and the headlights turned on.
Use this switch to turn on the fog lights. The fog lights will improve visibility at night and during foggy conditions.
The fog lights turn on when the fog light switch is turned to the
position and turn off when the switch is turned
to the 
position.
NOTE
The fog lights will turn off when the headlights are set at high beams.
Daytime Running Lights
Some countries require moving vehicles to have their lights on (daytime running
lights) during the daytime. The daytime running lights turn on when the vehicle
is driven and turn off when the park ...
Turn and Lane-Change Signals
The ignition must be switched ON to use the turn and lane-change signals. ...
Other materials:
Mazda 6 Owners Manual: Illuminated Entry System
When the illuminated entry system operates, the overhead lights, the courtesy
lights, and an ambient light* turn on in the following conditions:
The driver's door is unlocked after the ignition is switched OFF.
The ignition is switched OFF with all doors closed.
NOTE
(Overhead lights) ...
Mazda 6 Owners Manual: Key reminder switch inspection
1. Disconnect the negative battery cable.
2. Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION)
3. Disconnect the key reminder switch connector.
4. Inspect for continuity between the key reminder switch terminals using an
ohmmeter.
If not as specified, replace the key reminder ...