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

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Mazda 6 Service Manual: Specifications
Engine Electrical System *1 Q-85 is designed for i-ELOOP system. Only Q-85 should be used to ensure correct operation of i-ELOOP system. Consult an Authorized Mazda Dealer for details. *2 Not for i-ELOOP system. *3 This spark plug provides the SKYACTIV-G engine with optimum performance. Co ...

Mazda 6 Service Manual: Operating the Compact Disc (CD) Player
NOTE If a disc has both music data (CD-DA) and MP3/WMA/AAC files, playback of the two or three file types differs depending on how the disc was recorded. Inserting the CD Insert the CD into the slot, label-side up. The auto-loading mechanism will set the CD and begin play. NOTE There wi ...