Hi mate, I think what has probably happened is because petrol was put in it, it has messed up the firing order of the injectors. I had the same problem where the car would not start and the coil light (orange glow plug light) would be continously flashing. So wot i did is get a mechanic 2 reset the ecu.
MONDEO TDCI MAN replied to Chris_Plumber's topic in Ford Mondeo / Vignale ClubHi mate, i had the same problem on a 52 plate mondeo tdci 115 which i sold at work. It turned out to be the fireing order of the injectors. I took it 2 a mechanic i know which he plugged his computer in the ecu and reset it for me then it was fine after that, so it could be worth giving that a try. Luke