OK, first, you need to specify which engine you have, and any other particulars that might relate to your question. Next, I am confused about the reference to a 'reservoir intake port'. The access point for the power steering fluid is at the reservoir, behind the left-front headlight, with a green cap.
Did the fluid get contaminated somehow, or do you just want to change the old PS fluid with new? Typically, you will get the front wheels clear of the ground so they can turn, then unclamp and pull the supply hose from the reservoir (the one leading to the PS pump) and allow the fluid to drain into a container. Turn the steering wheel lock-to-lock (engine off) until you no longer are discharging fluid out of the reservoir. Put the hose back on, then fill the reservoir with new fluid. Have a helper turn the wheel again lock to lock as you watch the fluid level, having the helper stop every time the level gets too low, to add fluid. At this point, you are avoiding drawing air in. After a while the level won't drop as the steering is moved, and bubbles will cease to appear. Next, breifly (for a few seconds) start the engine, which will move air out of the pump. Resume moving the steering lock to lock with the engine off, and when you are satisfied that the level is staying constant, take it for a drive, again moving the steering full-stroke a low speeds. Any remaining air should purge fairly quickly.
One thing that I highly recommend is to seal those two rubber hoses at the bottom of the reservoir with silicone sealant. My 19 year-old A4's PS hoses stay dry as a bone after doing this: With the hoses disconnected, use alcohol and and lint-free cloth to swab an inch or so inside each hose. Likewise, carefully clean the plastic barbed hose fittings of the reservoir, then apply sealant behind the barb, so it won't get into the hose where the fluid will be. Clamp and there should be no leakage.