Have you tried sucking out the fluid with a turkey baster (several times) and refilling with synthetic fluid....

I am trying to think of the cheaper possible fixes first...

I once had a q45 that I filled with transmission fluid in the power steering case.... turns out the pump hated that fluid and groaned....replaced with real synthetic (valvoline)power steering fluid...and it behaved normally.

Now on the down side...I once owned a 72 mercedes that developed the groan....turned out it was the steering box...very expensive...

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1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]