My stearing has started acting like it has no power stearing, it comes and goes, the fluid wes changed a year and a half ago and the level is right. Im guessing its time for a new pump. 190,000 miles. Peach parts has both new and rebuilt pumps, what do you think of the rebuilt mb pumps?

Check the pressure before you replace the pump. The problem may be the steering rack.

how do you check the pressure