Hi - hoping for some advice. I was travelling down the motorway when the coil waring light starting flashing. I didn't lose complete power but acceleration was sluggish. I pulled off the motorway and left the car turned off for about an hour. I tried the car again and got back on the motorway for about another 50 miles with no warning light coming on. Has anyone else had a similar issue? The car is a 2009 A3 TDI.