I have a 2001 XC70 and it seems to die without warning. I was driving along and the car just died completely. The only thing that seems to work is the dome light and the radio when I turn the key on. I also hear random clicking in the engine compartment. I check all the fuses and they all have power. But I find if I disconnect the battery for an hour or two and short out the batt terminals it will fire right up. I repeat nothing works including door locks. Any input would be great.