Arnage Hydraulic Reservoir

[gjlelec]

I was mooching about under the bonnet on my Arnage today, getting to know where everything is etc. On the passenger side, next to the windscreen washer reservoir is this hydraulic fluid unit, i believe it does the power steering and suspension (correct me if i'm wrong) Upon removing the cap, the reservoir was empty, i could see the gauze strainer inside. I rang the franchise dealer with the pics below and they stated unless the car flags up "low level" then the empty reservoir is nothing to worry about. My question is if you were topping this up , how would you know where full is ? Secondly, i dont like relying on a microswitch, if i filled just above the gauze internal filter ,would i be overfilling the system ?? Thanks for any input

[gjlelec]

Thanks Adam, excuse this if its a bonehead question but why does pumping the brake pedal have an effect on this resevoir if its for suspension and steering ?- thanks

[gjlelec]

Ah, that explains it, many thanks