How in the H*** did water get into the P.S. system in the first place?
(There's NO interface between ANY system that uses WATER.)
'Been taking the MB to Jiffy Lube again?????
yeah, you just sucked the reservoir out with a Turkey Baster...
You need to COMPLETELY replace the PS Fluid.
The old REMAINING Contaminated fluid has ruined your new RP fluid.
schema ALA PP:
http://www.peachparts.com/shopforum/showthread.php?t=260481&highlight=reservoir+refill
Schema ALA BZWRLD:
http://www.benzworld.org/forums/w210-e-class/1413826-photo-diy-power-steering-fluid-change.html