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: Locking, Unlocking with Door- Lock Knob
Operation from inside To lock any door from the inside, press the door-lock knob. To unlock, pull it outward. This does not operate the other door locks. NOTE The red indication can be seen when the door-lock knob is unlocked. Operation from outside To lock the rear and front passenger doo ...

Mazda 6 Service Manual: Fuel line pressure inspection
Warning Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death. Fuel can also irritate skin and eyes. To prevent this, always complete the BEFORE REPAIR PROCEDURE. (See BEFORE REPAIR PROCEDURE.) Caution Disconnecting/connecting the quick r ...