Question: driver's side lock, is it mechanical?

hello,
Does any body know, if i put the key in the lock of the driver's side door and turn it, the door is opened mechanicaly? or it just sends a message throught the wires to electronicaly open the door?
The matter is that if it is mechanical, no electronic falt can lock me out of the car, but if it's electrical, probably should do something about it soon.
thanks
 
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