Mazda CX-5 2018 Owner's Manual page 341

(With cruise control)
If the set speed is set lower than the current vehicle speed by pressing the SET or RES/
switch, the warning beep is not activated for about 30 seconds even if the vehicle speed is
faster than the newly set speed by 5 km/h (3 mph). Be careful not to drive over the set speed.
(With Mazda Radar Cruise Control (MRCC) or Mazda Radar Cruise Control with Stop & Go
function (MRCC with Stop & Go function))
If the set speed is set lower than the current vehicle speed by pressing the SET or RES switch,
the warning beep is not activated for about 30 seconds even if the vehicle speed is faster than
the newly set speed by 5 km/h (3 mph). Be careful not to drive over the set speed.
NOTE
When the system is temporarily cancelled by depressing the accelerator pedal fully, the ASL
display shows the cancel display. If the vehicle speed exceeds the set speed by about 5 km/h
(3 mph) or more while the cancel display is displayed, the set speed display flashes but the
warning sound is not operated.
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NOTE
When the ignition is switched off, the system status before it was turned off is maintained.
For example, if the ignition is switched off while the ASL is operating, the system will be
operable when the ignition is switched ON the next time.
NOTE
When the cruise control, Mazda Radar Cruise Control (MRCC), or Mazda Radar Cruise
Control with Stop & Go function (MRCC with Stop & Go function) system becomes
operable after pressing the MODE switch, press the mode switch again to switch to the ASL.