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w124 86 300E
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Discussion Starter #1
Hi guys I have a 300E w124 86 my power steering is very very hard when you turn on the car and its running on low revolutions but when you put your foot down and that’s all in (P) and get the revs up the steering wheel gets looser and looser please guys any suggestions by the way the power steering fluid level is good
 

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About a dozen 1988, 1989, 1990, and 1991 sedans, wagons, 4Matics and 1 coupe
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5,454 Posts
Only thing I can think of that would cause the situation you describe is a bad power steering pump. Specifically, the pressure limiting valve. While i haven;t had a Benz pump apart, every other pump that I have serviced or dissected had a spring-loaded pressure limiting valve that dumped pressure at elevated RPMs. Otherwise the pressure would be so high at driving speeds that steering would be too light (and a hose or box seals would blow).
Unless someone here knows how to access the pressure relief valve your only option is to install another pump. I'd use a junkyard part if it were my car.
 
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