Hi there I have a C270 CDI W203 2003 model about 170000KM on the clock, i have been having a problem with rough idle when started but after moving it comes right but once i change the gear to park or reverse it starts again, also when i use the kickdown ( foot down) the car switches off and i get and error EL power control "EPC" message, but after put it into park and start again it goes off, i have been having trouble starting as well as it takes one or 2 hits to start. I put it on the DAS and got a few errors( rail pressure too low , then rail pressure to high, acc voltage too high ....), i changed the plastic fuel pipes from the fuel fillter to the fuel pumps and to the fuel rail, i have changed the fuel fillter, rail pressure sensor(the front one) , the acc pedal and the Air Mass Meter, iv taken out the Fuel pump ( the bottom one) to check for leaks but found non. i have now got no other idea and nor does any merch here, I am in SOuth Africa and they charge an arm and a leg here to use DAS at the dealer and well they all just useless Please please help !!!!