When the car has been sat idle for a while, like over night, and I first set off on a morning I can here a clunk from the front end. It is not very loud and only very slightly noticeable through the front pedals. It makes the noise after the car has moved back or forward about 5 yards. It only ever does it when I start up, and there is no noise afterwards when the car is in motion. No noise going over speed bumps and no noise going round corners. Only on a cold start up. Is it something I need to worry about.