I bought a 2016 1.5 diesel A180 3 weeks ago and filled the tank last Monday 13th January with diesel at a Maxol garage. The car wouldn’t start this morning and recovery took it to the dealer I bought it from who stated it wasn't diesel in the car and the liquid was yellow. He said it could be dodgy diesel or heating oil. There was half a tank of diesel in the car this morning and no problems since buying diesel on 13th and the car gets drove daily. Does anyone know could the car run that long and use a half a tank of dodgy diesel, heating oil or petrol before causing problems?