Mazda 6 Manual page 251

NOTE
If the vehicle speed decreases by about 15
l
km/h (9.4 mph) or more than the set speed,
the cruise control function may be
canceled.
When the vehicle speed is less than 21 km/h
l
(13 mph), the cruise control function is
canceled. In this case, the vehicle speed will
not return to the original set speed even if
the vehicle is accelerated to 25 km/h (16
mph) or higher and the RES switch is
pressed. Reset the cruise control function.
When Driving
i-ACTIVSENSE
4-127