Keyless entry and central locking are not the same. The difference between keyless entry and central locking is that in central locking, all the doors lock at the same time, i.e they lock simultaneously. Whenever the driver door lock is engaged or disengaged, all the four doors engage or disengage [depends on what the driver did]. Keyless entry, or remote key entry is a bit more sophisticated than central locking.In keyless entry, the need for key is eliminated by using a remote control key, which has buttons to operate the fuctions of a normal key. As for starting the ignition, there is a separate button near the steering.