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: Fuel-Filler Cap
To remove the fuel-filler cap, turn it counterclockwise. Attach the removed cap to the inner side of the fuel lid. To close the fuel-filler cap, turn it clockwise until a click is heard. CAUTION (U.S.A. and Canada) If the check fuel cap warning light illuminates, the fuel-filler cap may not ...

Mazda 6 Service Manual: AUX/USB mode
Audio can be heard from the vehicle's speakers by connecting a commerciallyavailable portable audio unit to the auxiliary jack. A commercially-available, non-impedance (3.5 ) stereo mini plug cable is required. Contact an Authorized Mazda Dealer for details. In addition, audio can be played fr ...