Hi, my name is martin and i currently drive a fiat punto 2007, every now and then mainly when its cold, (it happened last winter then fine all year and now the winter is back its started doing it again) i try and start my car turn the key, all the lights come on then try to start the engine and sometimes i hear a grinding noise and the car wont turn over, i have been told loads of different things which it could be, battery, alternator, starting motor, fly wheel, so bit confussed.