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: Split Folding
By lowering the rear seatbacks the luggage compartment space can be expanded.
WARNING
Do not drive the vehicle with occupants on folded down seatbacks or in
the luggage compartment. Putting occupants in the luggage compartment
is dangerous because seat belts cannot be fastened which coul ...
Mazda 6 Owners Manual: Egr valve inspection
Operation Test
Carry out the EGR Control Inspection. (See EGR Control System
Inspection.
If not as specified, perform the further inspection for the EGR valve.
Resistance Inspection
Note
Perform the following test only when directed.
1. Disconnect the negative battery cable.
2. In ...