Alfa 159, Brera & 946 Spider
I have a 2009 159 1.9 JTDm. The power steering started to make a noise. In my non-Alfa cars, I have fixed this simply by checking the fluid level.
I had green fuild in the reservoir and the level was between min and max. I don't know what fluid it was but it was green (GI/R, Synpower, something...