If your vehicle rapidly closes in on the vehicle ahead because the vehicle applies the brakes suddenly while you are traveling in headway control, the warning sound activates and the brake warning is indicated in the display. Always verify the safety of the surrounding area and depress the brake pedal while keeping a safer distance from the vehicle ahead.
Additionally, always keep a safer distance from the vehicles behind you.

Mazda Radar Cruise Control (MRCC) Display Indication
Setting the SystemMazda 6 Owners Manual: Before repair procedure
Warning
Fuel vapor is hazardous. It can easily ignite, causing serious
injury and damage. Always keep sparks and flames away from fuel.
Fuel line spills and leakage are dangerous. Fuel can ignite and
cause serious injuries or death and damage. Fuel can also irritate skin and
eyes. To ...
Mazda 6 Owners Manual: Tire Pressure Monitoring System
The Tire Pressure Monitoring System (TPMS) monitors the air pressure of all four
tires. If the air pressure of one or more tires is too low, the system warns the
driver by indicating the tire pressure monitoring system warning light in the instrument
cluster and operating a beep sound. The sys ...