Subaru 2004 Impreza Owner's Manual page 185

Instruments and controls
3. Return the selection switch to the neutral position
to prevent unintentional operation.
The mirrors can also be adjusted manually.
! Outside mirror defogger (if equipped)
Manual climate control system
3-48
Semi-automatic climate control system
The outside mirror defogger shares the switch with
rear window defogger.
The outside mirror defogger operates only when the
ignition switch is in the "ON" position.
To turn on the outside mirror defogger, push the
switch. To turn it off, push the switch again. The indi-
cator light located on the switch lights up while the out-
side mirror defogger is operating.
The defogger will automatically shut off after about 15
minutes. If the mirror clears before that time, push the
switch to turn it off. It also turns off when the ignition
switch is turned to the "ACC" or "LOCK" position. If de-