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: Tire Chains
Check local regulations before using tire chains. CAUTION Chains may affect handling. Do not go faster than 50 km/h (30 mph) or the chain manufacturer's recommended limit, whichever is lower. Drive carefully and avoid bumps, holes, and sharp turns. Avoid locked-wheel braking. Do not ...

Mazda 6 Service Manual: To Increase Cruising Speed
Follow either of these procedures. To increase speed using cruise control switch Press the RESUME/ switch and hold it. Your vehicle will accelerate. Release the switch at the desired speed. Press the RESUME/ switch and release it immediately to adjust the preset speed. Multiple operations wil ...