Mazda 3 Owner's Manual page 217

When Driving
Mazda Radar Cruise Control (MRCC)
Do not use the Mazda Radar Cruise Control (MRCC) system in the following locations.
Otherwise, it could lead to an accident:
Roads with sharp curves and where vehicle traffi c is heavy and there is insuffi cient
space between vehicles. Roads where frequent and repetitive acceleration and
deceleration occur (Driving under these conditions using the Mazda Radar Cruise
Control (MRCC) system is not possible).
When entering and exiting interchanges, service areas, and parking areas of highways
(If you exit a highway while headway control is in use, the vehicle ahead will no longer
be tracked and your vehicle may accelerate to the set speed).
Slippery roads such as ice or snow-bound roads (The tires could spin causing you to
lose vehicle control).
Long descending slopes (to maintain distance between vehicles, the system
automatically and continuously applies the brakes which could result in the loss of
brake power).
For the purposes of safety, switch the Mazda Radar Cruise Control (MRCC) system off
when it is not being used.
CAUTION
If the vehicle is towed or you are towing something, switch the Mazda Radar Cruise
Control (MRCC) system off to prevent an incorrect operation.
NOTE
The Mazda Radar Cruise Control (MRCC) system operates when all of the following
conditions are met.
The vehicle speed is about 30 km/h (19 mph) to 145 km/h (90 mph).
The Mazda Radar Cruise Control (MRCC) system is turned on.
The parking brake is not applied.
The Forward Obstruction Warning (FOW) indicator light (amber) does not illuminate.
The Dynamic Stability Control (DSC) is operating normally.
(Manual transaxle)
The shift lever is in a position other than reverse (R) or neutral (N).
The clutch pedal is not depressed.
(Automatic transaxle)
The selector lever is in the drive (D) position or manual (M) position (manual mode).
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