Yesterday I was driving and heard a beep. I saw my glow plug light flashing which according to the book that comes with the 2010 Golf TDI indicates a problem. I pulled over shut the engine off then started the engine again. The flashing light did not come on again. I called the dealer service and the person said if it happens again take it in. I drove home , 70 miles and have not had a problem. Nothing seems different as far as how the car drives and all gauges are normal. Should I take it to the dealer or see if it happens again? The car has been driven 800 miles.