Haynes manual says WSA-M2C 57-A, but I can't find this anywhere. I expect it's been replaced with a newer spec. Can I just get any old Ford (or any other generic) PAS fluid, and use that? Or do I need an exact replacement?
Does PAS fluid ever need changing, or is it okay to just keep topping it up? I can't find a procedure for an actual replacement, so I'm thinking it's one of those things that doesn't need doing any more, like changing gearbox oil (for which there is no drain plug).