How often should the power steering fluid shoul be changed at a 2004 ford mondeo?

i just got the car and the steering fluid is quite black... What steering fluid should I use? i work for a VW service and when I checked the level I filled it to the max with some steering fluid made for VW`s. this is temporary dough...And how often should I change it? In the manual it says that it only needs to be checked at 20.000 kmHow often should the power steering fluid shoul be changed at a 2004 ford mondeo?
Make sure the type is ok with Ford. The type should be listed on the fill cap, %26amp; owners manual.. Do not completely fill to the top. Fill only to the full line. The liquid needs room to expand. Most operators never change the steering fluid..but should around 100-125,000 milesHow often should the power steering fluid shoul be changed at a 2004 ford mondeo?
you should replace it every 100,000km,2yrs whichever comes first.use ATP its the best.