I have an S reg Corsa diesel that cut out on the motorway and will not run. It is not picking up fuel from the filter and i think it might be the stop solonoid.

When i look at the fuel pump i dont know which is the stop solonoid. On the top of the pump is a round black connection with 485 RDZ written on it. At the end of the pump over the injector pipes is a black plastic cover with Bosch and some numbers on it. Does anyone know if either of these is the stop solonoid?

Any ideas?