Mazda 6 Service Manual: No.20 noise occurs at idle when vehicle is stopped in all positions/ranges

No.19 excessive shift shock on torque converter clutch (tcc)

No.21 noise occurs at idle when vehicle is stopped in d, s, l ranges, or in r position

Other materials:

Mazda 6 Service Manual: Discharge headlight service warnings
Discharge headlight bulb service warnings To prevent electrical shock when replacing the discharge headlight bulb, dry hands thoroughly, and carry out work in an area out of rain. When the light switch is on, approx. 25,000 V of high voltage passes through the discharge headlight bulb so ...

Mazda 6 Service Manual: Cruise Control Function
While this function is operating, the headway control operation is canceled and only the cruise control function operates. The vehicle speed can be set more than about 25 km/h (16 mph). Use the cruise control function on expressways and other highways which do not require a lot of repeated acc ...