Mazda 6 Service Manual: No.22 vibration concerns (engine)

No.21 engine noise

No.23 a/c does not work sufficiently

Other materials:

Mazda 6 Service Manual: Manual Transaxle Shift Pattern
  The shift pattern of the transaxle is conventional, as shown. Depress the clutch pedal all the way down while shifting; then release it slowly. Your vehicle is equipped with a device to prevent shifting to R (reverse) by mistake. Push the shift lever downward and shift to R.   ...

Mazda 6 Service Manual: Fan motor
COOLING FAN REMOVAL/INSTALLATION 1. Disconnect the negative battery cable. 2. Remove the shroud panel. (See SHROUD PANEL REMOVAL/INSTALLATION.) 3. Remove the A/C pipe stay. 4. Remove the ATX pipe stay (ATX). 5. Remove in the order indicated in the table. 6. Install in the reverse order of remo ...