See also:

Lubrication oil circulation in the refrigerant circuit
Operate the air conditioner compressor at a low engine speed (at idle or low driving speeds) a few minutes each month during the off-season to circulate its oil. ...

Checking the fluid level
1) “MAX” level mark 2) “MIN” level mark Check the fluid level monthly. Check the fluid level on the outside of the reservoir. If the level is below “MIN”, add the recommended brake fluid to “MAX” ...

Key lock-in prevention function
This function prevents the doors from being locked with the key still in the ignition switch. ...