Hello. I have a 2006 Five Hundred here with about 40,000 miles on it. I thought that being closely related to the new Taurus, it must have a similar power steering system. My power steering fluid is original and looks very dark. I am thinking of flushing it using the Motorcraft Mercon V ATF fluid. Any ideas if this is THE "Mercon ATF" fluid the Ford 500 manual talks about? What is the fluid capacity? Thanks..