The High Beam Control System (HBC) operates to switch the headlights automatically between high and low beams after the ignition is switched ON and the headlight switch is in the AUTO and high beam position.
The High Beam Control System (HBC) determines that it is dark based on the brightness of the surrounding area. At the same time, the High Beam Control System (HBC) indicator light (green) in the instrument cluster illuminates.

NOTE
When the vehicle speed is less than about 20 km/h (12 mph), the High Beam Control System (HBC) switches the headlights to low beams.
High Beam Control System (HBC) (Some models)
Manual SwitchingMazda 6 Owners Manual: Component Parts
Microphone (hands-free)
The microphone is used for speaking voice commands or when making a Hands-free
call.
Talk button, Pick-Up button and Hang-Up button (hands-free)
The basic functions of Bluetooth® Hands-Free can be used for such things as making
calls or hanging up using the talk, pi ...
Mazda 6 Owners Manual: STEP 1: Contact Your Mazda Dealer
Discuss the matter with an Authorized Mazda Dealer. This is the quickest and
best way to address the issue.
If your concern has not been resolved by the CUSTOMER RELATIONS, SALES,
SERVICE, or PARTS MANAGER, then please contact the GENERAL MANAGER of the dealership
or the OWNER.
If it b ...