E-Class (W211) 2003-2009

E500 MERC 2005 HAS GIVEN ME HELL. HEAVY STEERING.

Old Mar 18, 2017 | 01:00 AM
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E500 MERC 2005 AVANTGARDE SALOON
E500 MERC 2005 HAS GIVEN ME HELL. HEAVY STEERING.

INITIALLY WAS HEAVY WHEN TURNING LEFT. WAS TOLD TO BUY NEW STEERING PUMP. I CHANGED PUMP; PROBLEM PERSISTED. WAS TOLD RACK. IT WAS SOFT JUST FOR A DAY. THE FOLLOWING DAY, IT WAS HARD TURNING RIGHT. WAS TOLD RACK WAS FAULTY, FIXED ANOTHER ONE BUT STILL NO CHANGE. IVE CHANGED RACKS 3 TIMES, NO EFFECT. I HAVE NOW PARKED THE CAR.
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Old Mar 18, 2017 | 09:21 AM
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2011 E63, 2011 Hyundai Genesis 4.6 v8, 2013 GMC Denali XL, 1965 Ford Mustang, 2005 Merc. E500
Did you change the power steering hoses? Hoses can wear on the inside and then cause blockage. I would have started there unless the rack was leaking or pump was making a noise.
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Old Mar 18, 2017 | 11:03 AM
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2009 E550 2000 Honda civic mash n' go
Is this a OEM MB rack? Did you replace oil tank for p/s fluid as well? Filter inside
tank can get clogged with debris and cause fluid restriction issues. Is there any air in the system?
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Old Mar 18, 2017 | 11:04 AM
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2009 E550 2000 Honda civic mash n' go
and what the fella above me said. Lines may be collapsed too
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Old Mar 21, 2017 | 11:50 AM
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Check the speed controlled proportional valve in the steering gear.
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Old Mar 21, 2017 | 06:29 PM
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From: dmv
2009 E550 2000 Honda civic mash n' go
Originally Posted by gafitanu
Check the speed controlled proportional valve in the steering gear.

not all models obtained this feature. but its worth a look. I think if that valve is faulty it's going to throw a esp light.
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Old Mar 22, 2017 | 12:26 PM
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The reason I pointed to the valve is because mine exhibits similar behavior when is cold outside for the first couple of turns after starting. It doesn't throw any codes and I can overpower it. It's quite expensive that's why I didn't change it.
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Old Mar 22, 2017 | 06:22 PM
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From: dmv
2009 E550 2000 Honda civic mash n' go
Originally Posted by gafitanu
The reason I pointed to the valve is because mine exhibits similar behavior when is cold outside for the first couple of turns after starting. It doesn't throw any codes and I can overpower it. It's quite expensive that's why I didn't change it.
the part itself is pricey?
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Old Mar 24, 2017 | 06:37 PM
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Originally Posted by cmriv
the part itself is pricey?


New "Genuine Mercedes-Benz" Power Steering Proportioning Valve $405 at online vendor!



Proportioning Valve



You are not alone with W211 power steering issues - here are couple of links to what others have written:

https://mbworld.org/forums/e-class-w...-rack-bad.html

https://mbworld.org/forums/e-class-w...e320-w211.html



Not all W211 have the speed sensitive power steering.
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Old Mar 28, 2017 | 05:54 PM
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From: dmv
2009 E550 2000 Honda civic mash n' go
that is pricey sheesh. Well hopefully OP figured it out. I don't know if i've personally seen one of those valves bad. I've seen them leak but haven't drive a MERK with SPS with a bad valve. It would be nice if we knew whether or not he has code 213 (SPS)
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