changing power steering pump.
i tried the search but i could not find any thing relevent to my case!
Any way here goes: my steering wheel on my 90 560 sel is hard to turn and the power steering fluid level slowly drops(under the car). should i replace the PS pump? how do i determine if the pump is bad? if so can some one give me details on how to replace the part, how to re-tension the belts etc....