All doors lock automatically when the lock side is pressed. They unlock when the unlock side is pressed.
Driver's door

Front passenger's door

To lock all the doors from an open front door, press the lock side of the door lock switch and then close the door.
NOTE
When locking the doors this way, be careful not to leave the key inside the vehicle.
Locking, Unlocking with Transmitter
Auto Lock/Unlock FunctionMazda 6 Owners Manual: General procedures
PRECAUTION (BRAKES)
Wheels and Tires Removal/Installation
1. The removal and installation procedures for the wheels and tires are not
mentioned in this section. When a
wheel is removed, tighten it to 88-118 N·m {9.0-12.0 kgf·m, 65.0-87.0 ft·lbf}.
Brake Lines Disconnection/Connection
Cautio ...
Mazda 6 Owners Manual: Oil pressure inspection
Warning
Continuous exposure to USED engine oil has caused skin cancer in
laboratory mice. Protect your skin by washing with soap and water
immediately after working with engine oil.
Hot engines and engine oil can cause severe burns. Turn off the
engine and wait until it and the engine ...