Opel ASTRA K 2015 Owner's Manual page 26

24 Keys, doors and windows
Note
Do not put the electronic key into the
load compartment or in front of the
Info Display.
Activation and Deactivation
keyless unlocking
If equipped, keyless unlocking of the
exterior door handles and the boot
can be activated or deactivated.
To deactivate the keyless unlocking,
press and hold b a at the same time
on the electronic key for approx. 3
seconds. The turn lights will indicate
the deactivation by flashing four
times. Using any exterior door handle
to unlock the doors or the boot will
indicated the deactivation by the turn
lights flashing fourt times quickly. If
keyless unlocking is deactivated,
deactive the alarm system before
starting the vehicle.
To activate the keyless unlocking,
press and hold b a at the same time
on the electronic key for approx. 3
seconds. The turn lights will indicates
the activation by flashing quickly
twice.
Replacing battery in electronic
key
Replace the battery as soon as the
system no longer operates properly
or the range is reduced. The need for
battery replacement is indicated by a
message in the Driver Information
Centre 3 122.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
To replace:
1. Press button at the back of the
electronic key unit and extract the
key blade from the housing.