Porsche Panamera Owner's Manual page 188

Exceptions for adaptive cruise control
Adaptive cruise control is not available in the
following situations:
– If the ignition is switched off.
– When PSM is off.
– If the driver's door is opened and the driver's
seat belt is not fastened.
– When parking or maneuvering in very tight
spaces.
– If the PDK selector lever is at position N, R or
P.
– On upward or downward slopes of more
than 20 %.
– When the electric parking brake is activated.
If one of these exception situations occurs when
adaptive cruise control is switched on, adaptive
cruise control will be switched off.
A message to this effect will appear on the
multi-function display.
186
Driving and Driving Safety
Messages on the multi-function display
If adaptive cruise control was deactivated
automatically or if an action cannot be performed,
a message to this effect in blue appears on the
multi-function display.
– "ACC not available!"
Adaptive cruise control is not available,
e.g. when maneuvering.
– "ABS/PSM intervention!"
Adaptive cruise control was deactivated
because ABS or PSM intervened as a control
mechanism.
– "Electric parking brake!"
Adaptive cruise control was deactivated
because the electric parking brake was
activated.
– "Selector position!"
Adaptive cruise control was deactivated
because the PDK selector lever is not in
position D or manual position M.
– "Impossible while parked"
The required action is not possible because
your vehicle is stationary, e.g. when setting
a desired speed.
– "Speed!"
Adaptive cruise control was deactivated
because the rpm limit of the engine was
reached in manual position M of the PDK
selector lever.
– "Gradient too steep!"
The desired distance or the desired speed
cannot be set because the gradient on the
road is too steep.
– "Stationary object"
The action is not possible because a stationary
object was detected ahead.
– "PSM off!"
Adaptive cruise control is not available
because PSM was switched off.
For information on Porsche Stability
Management (PSM):
f Please see the chapter "PORSCHE STABILITY
MANAGEMENT (PSM)" on page 202.
General information
"Sport" and "Sport Plus" mode
Adaptive cruise control regulates your driving
more dynamically in "Sport" and "Sport Plus"
mode.