where do i add power steering fluid? on 1994 BMW 740iL

where do i add power steering fluid?

Asked by for the 1994 BMW 740iL
The fluid on these cars is a green mineral( expensive $17/ pint ) oil that is added to the Power Steering Reservoir. It is VITAL to use the exact oil or it will ruin your system.
hi, where is it? is the bottle that you have to screw off and has a round filter?
1 more answer
You will have to go to the dealer and get the hydraulic fluid which costs about $40.00 a can. There is a reservoir near the back of the engine on the drivers side, you put it in there and hope to GOD nothing else breaks.