Question about 2007 Mercedes-Benz R500

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Have a 2006 R500 Mercedes and still hearing noise after replacing power steering pressure hose. Turn wheel back and forth 30 times as instructed with engine off. Once started and turning wheel no noise but once car off jacks and driving noise returns, Still hear air leaking from filler cap. Still appears foaming occurs after driving. Any suggestions??

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The rack and pinion unit may have a pinhole leak

Posted on Sep 05, 2010

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TO BLEED THIS SYSTEM.DO NOT START ENGINE.MAKE SURE POWER STEERING FLUID LEVEL FULL.RAISE VECHICLE UNTIL FRONT WHEELS ARE OFF THE GROUND .TURN THE STEERING WHEEL FROM STOP TO STOP ABOUT 30 TIMES DURING THIS PROCESS CONTINUE TO TOP OFF THE FLUID AS NEEDED.START THE ENGINE AND CHECK THE FLUID LEVEL TOP OFF IF NECESSARY.ALLOW TO IDLE FOR 1 MINUTE.TURN STEERING WHEEL SLOWLY FROM STOP TO STOP SEVERAL TIMES AT IDLE SPEED.THE SYSTEM HAS BEEN BLED WHEN AIR BUBBLES NO LONGER RISE TO THE SURFACE IN THE FLUID RESERVOIR AND THE FLUID LEVEL NO LONGER DROPS.

Posted on Sep 05, 2010

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