I have a 2005 cmax, 2.0 litre petrol, full electric pack. Went to go out this afternoon, having been in and out of the car this morning. Driver door was open but the key fob would not work to lock or unlock. When I go to start it, the info display goes blank and the car won't start. The light in the top of the display (red) flashes quickly. Makes no difference if I lock and unlock the car manually but the alarm goes off if I open the bonnet. Any ideas?