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: Height Adjustment
Adjust the head restraint so that the center is even with the top of the passenger's ears. To raise a head restraint, pull it up to the desired position. To lower the head restraint, press the stopcatch release, then push the head restraint down. Front outboard seat Rear outboard seat ...

Mazda 6 Service Manual: Front wheel alignment
Specification (Unloaded)*1 Normal Elevated*3 *1 : Engine coolant and engine oil are at specified level. Spare tire, jack and tools are in designated position. *2 : Difference between left and right must not exceed 1°30'. *3 : Distance between wheel center and fender brim is 402 mm {15.8 ...