The direction the vehicle is moving is displayed while the vehicle is being driven.

Cruise Control Set Vehicle Speed Display (Some models)
Warning (Display Indication)Mazda 6 Owners Manual: Fuel Economy Monitor
The Control Status and Fuel Consumption are switched and displayed by operating
each icon in the display.
In addition, after completing a trip, the total energy efficiency to date is
displayed in the ending display when the ending display is turned on.
1. Select the icon on the home
screen ...
Mazda 6 Owners Manual: Audio control switch removal/installation
Note
The audio control switch and the cruise control switch use a
common connector.
1. Disconnect the negative battery cable.
2. Remove the driver-side air bag module. (See DRIVER-SIDE AIR BAG MODULE
REMOVAL/INSTALLATION.)
3. Remove the steering wheel.
4. Remove in the order indicated ...