Opel ASTRA Owner's Manual page 166

164 Driving and operating
For safety reasons, the cruise control
cannot be activated until the foot
brake has been operated once.
Activating in first gear is not possible.
Do not use the cruise control if it is not
advisable to maintain a constant
speed.
Illustrations show different versions.
On vehicles with automatic
transmission or manual transmission
automated cruise control can be
activated in automatic mode and
manual mode.
Control indicator m 3 97.
Switching on
Press m; control indicator m in
instrument cluster illuminates white.
Activation
Accelerate to the desired speed and
turn thumb wheel to SET/-, the
current speed is stored and
maintained. Control indicator m in
instrument cluster illuminates green.
Set speed is indicated on the display.
Accelerator pedal can be released.
Vehicle speed can be increased by
depressing the accelerator pedal.
When the accelerator pedal is
released, the previously stored speed
is resumed.
Cruise control remains activated
while gearshifting.