Im having a simalar issue. This mornig I went for a coffee after the car starting perfectly fine to go there. When I grabed my coffee and went to start my car , nada. Lots of battery power but no starter sound. So a block away I had my car towed to my buddies shop. Diagnoses: Fusable link, broken/corroded wire in the harness. After fixin the wire starts like a charm. But to the related problem my DRL modual is not working and my km display sometimes cuts out, shows partial #'s or displays the whole thing. I have noticed under the hood some loose wires that don't seem to be where they should. Its seems like the split loom has corroded away and they are left for barren, prone to damage. To me it seems like you should check your grounds and certian elec. connections. Or mabey try running it on a ODB tester to see if any codes come up.
Hope some of this helps