use ATF for the fluid. It's only in some recent models, like 2000 and newer, that some MB models require a specific P/S fluid. This is according to the MB "Approved Service Products List", Nov. 2001.
1994 MB E320 Coupe (199,500 mi)
1992 MB 190E 2.6 (173,000 mi)
1983 Porsche 911SC (148,000 mi)
2004 Volvo V70 2.5T (198,000 mi)
President of CT/Westchester Section