Mazda 3 2018 Owner's Manual page 235

Slopes with a steep gradient (The vehicle ahead may not be detected correctly, your vehicle
may slide while stopped by the stop hold control, and it may accelerate suddenly after it
starts moving.)
For safety purposes, switch the MRCC system off when it is not being used.
CAUTION
If your vehicle is towed or you are towing something, switch the MRCC system off to prevent a
miss-operation.
NOTE
The MRCC system does not detect the following as physical objects.

Vehicles approaching in the opposite direction

Pedestrians

Stationary objects (stopped vehicles, obstructions)

If a vehicle ahead is traveling at an extremely low speed, the system may not detect it

correctly.
During headway control travel, do not set the system for detection of two-wheeled

vehicles such as motorcycles and bicycles.
Do not use the MRCC system under conditions in which close proximity warnings are

frequently activated.
During headway control travel, the system accelerates and decelerates your vehicle in

conjunction with the speed of the vehicle ahead. However, if it is necessary to accelerate
for a lane change or if the vehicle ahead brakes suddenly causing you to close in on the
vehicle rapidly, accelerate using the accelerator pedal or decelerate using the brake
pedal depending on the conditions.
While the MRCC system is in use, it does not cancel even if the selector lever (automatic

transaxle)/shift lever (manual transaxle) is operated and any intended engine braking will
not occur. If deceleration is required, lower the vehicle speed setting or depress the brake
pedal.
The sound of the automatic brakes operating may be heard, however, it does not indicate

a problem.
The brake lights turn on while the MRCC automatic braking is operating.

Mazda3_8GE4-EA-17F_Edition1
When Driving
i-ACTIVSENSE
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