were do i get a repair manual for a renalt kangoo ?

a red light came up on the right hand side of the dash board in my 2000 plate renalt kangoo van, it looks like a tempriture gage with wavey lines underneeth it,, as that came on,,, the yellow tempriture gage thats on the left went right up to the top,,,and the van then started to cut out .i managed to get back home and turn it off with the key but now i dont want to or damage it or make maters any worse than they are now.