how can i get my c220 to crank?

i have a 96 c220 my son drove it one day locked it and unlocked it, but the lock did not work , i do not have a remote, hve changed the relay fuse and fuel pump out, the red and green lights on the rear view mirrow does not light up, it has a factory viper alarm, that i do not have the alarm to it. The car will aturn over but will not crack, help