Hi I have just bought a C5 2.0 HDi 2002 with 119,000 miles on the clock. It's a very tidy car hardly any marks inside or out and drives very well, comfortrable and quiet. However I have a problem starting it in the mornings. In the past week it has started fine twice,struggled to start 3 times and not at all once but did start about an hour later. The car turns over and feels as if its about to start but dosnt.The battery is fine and plenty of fuel in the tank. I was going to get the glowplugs and relay changed as the glow plug warning light stays on for a very short time before going out. But after reading many posts im not sure as to the problem now as some say it could be glowplugs, relay or fuel delivery problem. I've listened to the pump under the rear seat when starting and this seems to work ok as i can hear it working. The car is a lovely car and i hope its a relativly simple fix, any ideas ???