MG GS Owner's Handbook Manual page 207

STARTING & DRIVING
Alarm Systems
Your car is fitted with an electronic antitheft alarm and
engine immobilisation system. To ensure maximum safety
and operation convenience, we strongly recommend you
to carefully read this chapter to fully understand the
activation and deactivation of antitheft systems.
Engine Immobilisation
Engine immobilisation is designed to safeguard the vehicle
from theft. Engine immobilisation can only be deactivated
to start the engine by using the matched key.
Engine Immobiliser
When the matched key is inserted into the ignition
switch and the car is started, engine immobilisation is
deactivated automatically.
from the ignition switch, the vehicle will automatically
enable engine immobiliser. When the ignition switch is in
position II, if engine immobiliser cannot identify the key
inserted into the ignition switch, the engine immobiliser
warning lamp on the instrument pack illuminates, and
the information centre display of some models will show
190
When the key is removed
Invalid Key
. If the engine can still not be started by
using the spare key, seek an MG Authorised Repairer.