thanks for the replies..the lamp is definitely orange. I've booked my car in next week for a new accumalator as it's ticking furiously and i quizzed him over this light and drew him a picture (the picture resembled an acorn shape with a reservoir fluid ripple a third up from the bottom, with small inlet/outlet pipe left and right near to the top of the acorn) and i got the position wrong in my previous message. it's the right hand set of warning lamps, top row above the handbrake applied red lamp. The orange glo-plug lamp is bottom left next to the handbrake applied lamp. where was I....the mechanic seems to think that diesel citroen xantia's have a water in fuel filter sensor and showed me where it would be on my engine and told me not to worry about it...only I could own a car that has a lamp thats not in the book....