Seem to have an issue with the glow plugs not thinking its cold enough. Thought the glow plugs were faulty so changed them as well as the ECT sensor. but this did not solve my problem. I have also changed the glow plug relay in the e box. The light on the dash is working as it comes on with ignition as does the srs abs engine oil lights so on and so on but it goes out with them as well. I know they dont come on above 5 degrees but its been a lot colder than that and the car runs rough when it starts. Its defiantly an issue with the glow plug system because its worse the colder it is. Car runs fine when its warmed up. any ideas would be useful. i have looked on rave to see how it works but the electrical diagrams dont make much sense to me.