Finally getting to the end of this now, found the little buggers with a mirror, doubled up back and lots of patiants. What a place to get to. I have managed to remove one of the middle glow plugs, i tested them by continuity on the thread end to body and it was clear. Is there another way to test them ?Sorry to be a pain, Kia Carens 52 trying to locate glow plugs. (i am very green on deisel engines). I have the top plastic cover off looking down on top of the engine.