its done it when cold and warm as I stopped at the station about half a mile from my house on way to work one morning without getting petrol but didn't lock it, came back, put key in, pressed the button and it wouldn't start, so removed key, locked then unlocked car again, key in and still not start, had to do this procedure about 4 or 5 times until it starts! I get sum looks at the forecourt lol. This is a real pain, then at home or car park at work I can start, stop, lock, start many times with no problems so it cant be the starter which I thought it mite be :S