Hi I'm new any help would be Appreciated

Hello all, I have recently bought a discovery td5, been going really nicely until Sunday, driving home and engine has some sort of rattle to it (a new one), any how took to garage thought maybe idler pulley? Took that off and had a look and has no damage but slight bit if play?
Been looking throughout the manual and said make sure ace fluid is topped up, well that does not even have hose coming from it? It that right?
Noise seems to be coming from around compresser?
Thank you for reading and any advice would be greatly received ?

If its a rattle near compressor . Try the bracket next to the transmission brake . It's a large square bracket/wieight . Mine worked a little losse once and made real rattle sound from mid point under car .

Some don't have ace fitted

Look at the power steering resavior. 2 caps and you have ACE. 1 You don't
Griff