Below the alternator - driver's side.
http://www.mercedesonly.com/maintenance_tips.htm
On my 1998 E320 the power steering fluid is supplied by the load leveling hydraulic fluid resivoir.
If your car is equiped with power steering, the reservior is located in the engine bay on the drivers side. It is attached to the engine where the belts run.
where is power steering reservior 2002 vw jetta tdi
Replace the power steering pump located just right of the windshield washer fluid reservior in the left front corner of the engine compartment. Add power steering fluid and replace serpentine belt. (Belt part #: 425K4)
open hood, front of engine on th drivers side. small reservior with black cap.
on the right side of the engin in the frount
According to the 2008 Ford Escape Owner Guide : It has the Electric Power-Assisted Steering system ( EPAS ) There is no power steering fluid reservoir to check or fill
mercon III
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Below the alternator
Secure the power steering pump with the retaining bolts. Attach the power steering hose to the power steering pump. Put the belt on to the power steering pump. Fill the power steering system with fluid.