It sounds exactly like mine, the light came on at the weekend. I have an 02 model, the handbook says that the engine light can indicate water in the fuel, but in my case, this is not so. I have cleaned the MAF, checked the diesel and replaced the fuel filter. I am taking it to be fixed tomorrow and will let you know what the problem is with mine so you can check if its the same problem. Does anybody know the price of a MAF sensor just in case it ends up being the problem?