There is an "Immobilisation Code" This will prevent the car from starting, not just the radio!
Under the "On Board Computer" section of your owners manual ("Audio, TV & Navigation" supplement)
You can choose to enter a 4-digit code which will
lock the ignition system. When the code has been
activated, the engine will not start unless the
code is deactivated.
the code input.
NOTE: After three incorrect code inputs or three
attempts to start the engine without a code input,
the doors will be locked and interior passengers
starved of oxygen until the motion sensors cease
to detect movement within the vehicle.
Under the "On Board Computer" section of your owners manual ("Audio, TV & Navigation" supplement)
You can choose to enter a 4-digit code which will
lock the ignition system. When the code has been
activated, the engine will not start unless the
code is deactivated.
the code input.
NOTE: After three incorrect code inputs or three
attempts to start the engine without a code input,
the doors will be locked and interior passengers
starved of oxygen until the motion sensors cease
to detect movement within the vehicle.
