Marc price

I also have the same problem. It seems my car will start fine , I'll then drive a few miles turn the engine off and when I try to start it again, nothing, won't even turn over. It will usually start again after 4 hours. I have been told it could be the inhibitor switch by one person and it could be the relay by another person. Can't seem to find the relay anywhere to check it. So what do I Change first, inhibitor or relay? HELP