Hi guys, My 2001 A2 Tdi has developed a problem. It is very difficult to start the car.Takes 10-20 secs of cranking once started within in 5 mins of driving it completely dies. Then it is difficult again to start again. I have changed the glow plugs, battery is fine also. I am thinking it could be some thing to do with fuel. Fuel pump maybe. Any advice will help guys. Thanks in advice.