Power steering/hydraulic fluid

[Audidothat]

Hello all

I have started getting a slight intermittent whine and believe it is low fluid level related and so want to check whether it needs a top up.
A search reveals the blighter is under the NS air box, is that correct?! Surely I don't have to remove an airbox to check a level and top up. Is there an easier way? Perhaps through the wheel arch liner?
In fact that's probably just as awkward......why isn't it just at the top of the engine bay LOL!