Cadillac CTS 2018 Owner's Manual page 220

When following a vehicle and entering
a bend, ACC may not detect the
vehicle ahead and accelerate to the set
speed. When this happens the vehicle
ahead symbol will not appear.
ACC may detect a vehicle that is not
in your lane and apply the brakes.
ACC may occasionally provide an alert
and/or braking that is considered
unnecessary. It could respond to
vehicles in different lanes, signs,
guardrails, and other stationary
objects when entering or exiting a
bend. This is normal operation. The
vehicle does not need service.
Other Vehicle Lane Changes
ACC will not detect a vehicle ahead
until it is completely in the lane. The
brake may need to be manually
applied.
Do Not Use ACC on Hills and When
Towing a Trailer
DRIVING AND OPERATING
Do not use ACC when driving on steep
hills or when towing a trailer. ACC will
not detect a vehicle in the lane while
driving on steep hills. The driver will
often need to take over acceleration
and braking on steep hills, especially
when towing a trailer. If the brakes are
applied, the ACC disengages.
Ending ACC
There are three ways to
disengage ACC:
Step lightly on the brake pedal.
Press .
J
Press .
Erasing Speed Memory
The cruise control set speed is erased
J
from memory if is pressed or if
the ignition is turned off.
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