Ok so a little update which had left me totaly stumped...
I had it on a computer yesterday to get the fault codes read and this is what I got
4212 Glow Plug, Cyl 1
4232 Glow Plug, Cyl 3
4242 Glow Plug, Cyl 4
43F1 Electric auxiliary Heater
4B90 Rail-pressure monitoring on engine start
4222 Glow Plug, Cyl 2
4630 Rail-pressure plausibility pressure-controlled
So on the back of that I changed to glow plugs today (mission of a job) but got it all out and back together without breaking or losing anything, BUT when I went to start it, it just turns over and doesn't start up. So thought i'd try jump start it (which use to work before changing the glow plugs) but that didn't work either.
All fuses seemed fine, I also checked voltage across the battery prior crank (12.6v) and on crank (11.2v).
Does anyone have any advice on what I should do? Please help, im stuck without my car
Thanks in advance