Cadillac 2004 XLR Owner's Manual page 125

Once ACC is set, it may immediately apply the brakes if
it detects a vehicle ahead is too close or moving
slower than your vehicle.
Make sure the set speed is visible on the HUD so you
know the speed your vehicle will accelerate to if no
vehicle is detected in your path. Keep in mind speed
limits, surrounding traffic speeds and weather conditions
when adjusting your set speed.
Increasing Set Speed While Using ACC
There are two ways to go to increase set speed:
•
Use the accelerator to get to the higher speed.
Press the set button at the end of the lever,
then release the button and the accelerator pedal.
You'll now cruise at the higher speed.
This symbol will appear on
the Head-Up Display
(HUD) to indicate that ACC
is active. See Head-Up
Display (HUD) on
page 3-29 for more
information.
•
Move the ACC switch from on to resume/increase.
Hold it there until the desired set speed is displayed
in the HUD, then release the switch. To increase
your set speed in very small amounts, move
the switch briefly to resume/increase. Each time
you do this, your vehicle set speed will increase by
1 mph (1.6 km/h). Your vehicle will not reach the
set speed until ACC determines there is no vehicle
in front of you. At that point, your vehicle speed
will increase to the set speed.
Decreasing Set Speed While Using ACC
Press in the set/decrease button on the end of the lever
until you reach the lower speed you want, then
release it.
To slow down in very small amounts, briefly press the
set/decrease button. Each time you do this, your
set speed will be 1 mph (1.6 km/h) slower.
Resuming a Set Speed
Suppose you set your ACC at a desired speed and then
you apply the brake. This will disengage the ACC.
But you don't need to reset it.
Once you are going about 25 mph (40 km/h) or more,
you can move the ACC switch briefly from on to
resume/increase. ACC will be engaged with the
previously chosen set speed.
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