Subaru 2005 Forester Owner's Manual page 299

Starting and operating
To increase the speed (by accelerator pedal)
1. Depress the accelerator pedal to accelerate the ve-
hicle to the desired speed.
2. Push the control lever downward in the "SET/
COAST" direction once. Now the desired speed is set
and the vehicle will keep running at that speed without
depressing the accelerator pedal.
NOTE
If the difference between the actual vehicle speed
when the control lever is pushed downward and
the speed last time you set it is less than 4 mph
(6.8 km/h), the vehicle speed will be lowered by 1
mph (1.6 km/h). This occurs because the cruise
control system unit regards this lever operation as
that intended to decrease the vehicle speed.
7-42
To decrease the speed (by control lever)
Push the control lever downward in the "SET/COAST"
direction and hold it until the vehicle reaches the de-
sired speed. Then, release the control lever. The vehi-
cle speed at that moment will be memorized and treat-
ed as the new set speed.
When the difference between the actual vehicle speed
and the set speed is less than 4 mph (6.8 km/h), the
set speed can be lowered 1 mph (1.6 km/h) each time
by pressing the control lever downward in the "SET/
COAST" direction quickly within 0.25 second.
UB7203BA