The steering lock makes steering difficult if the car is e.g. taken unlawfully. A mechanical noise can be perceived when the steering lock locks or unlocks.
Activating the steering lock
The steering lock is activated when the car is locked from the outside and the engine is switched off. If the car is left unlocked then the steering lock will lock automatically after a while.
Deactivating the steering lock
The steering lock is deactivated when the car is unlocked from outside. If the car is not locked, the steering lock will deactivate if the remote control key is inside the passenger compartment and the car is started by turning the start knob clockwise to unlock the steering lock.