My manual says use ATF in the power steering reservoir, but the cap on the reservoir says use BMW "CHF" fluid. I can't find anything that is compatable at the parts stores, and want to put the right thing in. I found some STP universal fluid that is O.K. for Mercedes as well as "most other foreign cars except Honda". Any help will be greatly appreciated. I put new clamps on my hoses so I hope I've stopped the leaks, now I need to top off the reservoir.