Mazda CX-52017 Owner's Manual page 315

When Driving
Cruise Control
To Deactivate
When a cruising speed has been set
(cruise set indication (green) turns on)
Long-press the OFF/CANCEL switch or
press the OFF/CANCEL switch 2 times.
When a cruising speed has not been set
(cruise main indication (white) turns on)
Press the OFF/CANCEL switch.
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