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: Lane Departure Warning
If the system determines that the vehicle may deviate from its lane, the lane departure warning (beep sound, rumble sound*1, or steering wheel vibration) is activated and the direction in which the system determines that the vehicle may deviate is indicated in the multi-information display and ...

Mazda 6 Service Manual: Cooling (With air conditioner)
1. Set the mode selector dial to the position. 2. Set the temperature control dial to the cold position. 3. Set the fan control dial to the desired speed. 4. Turn on the air conditioner by pressing the A/C switch. 5. After cooling begins, adjust the fan control dial and temperature control d ...