I think the car will have the same engine as my Zantia 1996 (XUD 1.9TD).
The plugs will warm and the coil light will go out on your dash...count to 4 after the light has gone out then try. The Plugs continue to heat after the light has gone out and should give you a bit more warmth to start the car.. If you have never changed the Glow plugs it is a faily easy job and they can be bought cheap from ebay. If it always starts 2nd 3rd time you have to weight up wether its worth the bother/expence of changing them.
Thanks
Joe
January 2009