Mazda 6 Service Manual: No.23 a/c does not work sufficiently

No.22 vibration concerns (engine)

No.24 a/c is always on or a/c compressor runs continuously

Other materials:

Mazda 6 Service Manual: Cruise Control Function
While this function is operating, the headway control operation is canceled and only the cruise control function operates. The vehicle speed can be set more than about 25 km/h (16 mph). Use the cruise control function on expressways and other highways which do not require a lot of repeated acc ...

Mazda 6 Service Manual: Drive belt replacement
1. Remove the splash shield (RH). 2. Turn the center of the tensioner pulley clockwise to release tension to the drive belt. 3. Remove the drive belt. 4. Reinstall the drive belt or install a new drive belt. 5. Verify that the drive belt auto tensioner indicator mark does not exceeds the l ...