I have a manual 98 Audi A4 Quattro V6 it has 160,000 miles. While driving on the highway in 90 degree heat it lost all power then died, and now won't idle at all. The oil pan is wet underneath the car, but has all its fluids. When starting the fans make a slight abrasive sound, the engine shakes, the rpm meter goes up and down, then dies even when you give it gas. Past repairs have been engine flushing due to carbon build up from bad gas.