Occasionally my car will just fail to turn over, usually if I park then go to start it within a few mins. The relay is clicking in, you can hear it clunking. I have also had the relay and started apart to service them many months ago now and its workered great till now. Has anyone had to replace their starter brushes yet? As I have a suspicion they may be the cause. As a note, battery isn't the greatest, but it turns over fine when it actually does.