Fill it to the mark that is inside of the res. . It should be about 1/4 of an inch below the top lip. Also I would find out where the other 80% fluid went to.
BTW be sure to check the owner's manual as to what type of fluid you're supposed to use. Both of my Benzes actually call for ATF in the power steering.
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
Last edited by rickjordan; 01-09-2002 at 12:44 AM.