problem with nissan micra
 

Hi All,
I have a new Nissan Micra.
2 problems.
problem-1: how to lock the doors from inside. I have central lock system works from outside. can any one tell me how to lock/child lock from inside?
problem-2:
what is the music format supported in inbuilt cd player?
when i burn a cd with mp3 format it gives a error (cd error).

can anyone suggest me to do these?

many thanks in advance,