Marea just churning over this morning, but won't start. Checked for fuel flow etc, all OK. Alarm is disconnected because it and the central locking had stopped responding to key fob, so reconnected it. Still nothing. Remembering that the yellow 'filament' indicator had been showing after start up, decided to replace glow plugs. Got to the last one and the tip has snapped off and stayed in the head. Any ideas to get it out without taking the head off because that will cost more than the car's worth! Also any ideas to get it running, surely it will start on four glow plugs.