I recently bought a 2011 Audi A6 2.0d that has done 55,000 miles. I was driving on the motorway at about 70mph when the car lurched and the engine management light came on, followed by the engine losing power. I pulled over to the hard shoulder to see what was wrong and the engine was stuttering, as if it was struggling to get diesel. It rectified itself and starting ticking over normally but when I pulled off the engine management light stayed flashing and the engine had no power. The engine management light and the emission control lights are on the dash and I still have no power. I've booked a check with an Audi garage next week. Can anyone give me some advice as to what might be the problem?