Steering is difficult at low speeds after a U turn - Mercedes-Benz Forum
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post #1 of 33 (permalink) Old 06-03-2019, 05:59 AM Thread Starter
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Question Steering is difficult at low speeds after a U turn

Hello all,

2009 CLK 350 with the sports suspension package (code 486), 116,000 miles.

I made a tight U turn on Saturday and when I reached my destination, the steering was extremely difficult to turn. At speeds over a few miles an hour, it returns to normal.

I put the car on my rack and when I turn lock to lock with the wheels off the ground, I hear a creaking sound from the passenger side strut. There is no leaking fluid as I had just done a service on the car that morning.

Anyone have an idea of what could be causing this? Steering rack? Struts?

Thanks in advance.

Blackduc1

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2003 Lexus LS 430 Sold!!
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2005 E500 Estate - Sold

2004 E320 Estate - Sold

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post #2 of 33 (permalink) Old 06-03-2019, 06:21 AM
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Check the PS for any signs of bubbles or foam. If so, you need to bleed it. You do this with the engine running, front wheels off the ground, and turning the steering wheel fully lock to lock about 100 times (yes, it often takes that many to get air out of the system).

If there is no foaming in the PS fluid, make sure the pump seems to be working and that the fluid level is correct. If all of that is good, then it may be in the rack. I doubt a suspension problem would cause it to be hard to turn in both directions. Also, is it hard to turn with the wheels of the ground? YOu should be able to grab a tire and turn it by hand.

Oh, one more thing, does your car have code 213, for "vario steering"? If so, there is a valve on the rack that can go bad. Also check its electrical connector.

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post #3 of 33 (permalink) Old 06-03-2019, 07:00 AM Thread Starter
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WDBTJ56H49F270278 is my VIN. I ran the number and I did not see code 213.

There was no foam in the steering pump reservoir, and no signs of leaking. In fact, I went over the whole undercarriage and was glad to see no issues or any leaks.

My Father was on the ground, while I was in the car on the rack, and he could turn the wheels by hand. I could turn the steering wheel as normal when the car was off the ground.

Is there a reason why a sharp U turn would (left hand) would cause a problem like this to surface?

Thanks for your help Rodney!

Rick

2009 CLK 350 Coupe

2003 Lexus LS 430 Sold!!
(referred to as the Silver Mistake)

2005 E500 Estate - Sold

2004 E320 Estate - Sold

1998 E320 - Sold
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post #4 of 33 (permalink) Old 06-03-2019, 11:28 AM
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Since you can manually turn the wheels with them off the ground, I don't think it's a suspension issue. So is it like you have no power steering at very low speeds? Make sure the serpentine belt is not dragging - a bad idler or tensioner pulley could cause issues.

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post #5 of 33 (permalink) Old 06-03-2019, 11:55 AM Thread Starter
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Rodney,

You are exactly right; the car behaves as if I have no power steering at low speeds, but once the car begins to move, the steering returns to normal effort.

The car is still on the rack, so I will go over the pulleys and the belt(s), when I get home.

Thanks for your help! I'll keep you informed.

Rick

2009 CLK 350 Coupe

2003 Lexus LS 430 Sold!!
(referred to as the Silver Mistake)

2005 E500 Estate - Sold

2004 E320 Estate - Sold

1998 E320 - Sold
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post #6 of 33 (permalink) Old 06-04-2019, 02:03 AM
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After fitting new thrust control arms to my friend's CLK350 he said the steering felt 'easier ' at low speeds,..

Maybe check all your control arm main bushings and ball joints and steering ball joints for integrity,,,the u turn may have pushed something over the edge.
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post #7 of 33 (permalink) Old 06-04-2019, 05:15 AM Thread Starter
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Thanks for all of the information and guidance guys.

I left the car on the lift since Sunday,under engine plastics removed and I put some newspaper under the car.

When I got to the car last night, there was a small dot of power steering fluid on the newspaper. So, even though I couldn't see any leaks, she does have a leak on the back side of the pump. I am going to change that tonight and use new fluid, and we will see if that solves the problem. Also bought a new serpentine belt and I am going to install that as well. 116,000 miles, I see it as preventative maintenance.

If that works out, I am also going to tackle the lowering springs I have for this car. The struts are dry and look like they are a replacement set of Sachs in the front and rear, so I am not going to change them out now. The springs I bought only drop the car about an inch +/-, so I don't think there will be any problems with the struts and lowering springs.

Thanks again guys, and I will examine the all of the control arm bushing for wear or damage.

I'll let you know how it all works out!

Best,

Rick

2009 CLK 350 Coupe

2003 Lexus LS 430 Sold!!
(referred to as the Silver Mistake)

2005 E500 Estate - Sold

2004 E320 Estate - Sold

1998 E320 - Sold
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post #8 of 33 (permalink) Old 06-05-2019, 05:08 AM Thread Starter
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Hey guys,

I need help getting the correct power steering pump for this car.

AutoParts International says there are multiple part numbers for the power steering pump. I gave them the VIN and they still couldn't figure out which pump.

My VIN is WDBTJ56H49F270278. I have the sports package and the elegance package, but I see nothing about variable steering assist which is what they are having a problem with.

Would anybody be able to direct me to a reliable source to get the power steering pump?

Thanks,

Rick

2009 CLK 350 Coupe

2003 Lexus LS 430 Sold!!
(referred to as the Silver Mistake)

2005 E500 Estate - Sold

2004 E320 Estate - Sold

1998 E320 - Sold

Last edited by Blackduc1; 06-05-2019 at 05:26 AM. Reason: because I misspelled my own name...
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post #9 of 33 (permalink) Old 06-05-2019, 11:45 AM
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There are two part numbers: A0054665701 and A0054665901. I the latter (...5901) is an optional supplier's part, but you will likely only find the part listed under the first one (...5701). I think if you put in your car's details at most parts stores, you'll find A0054661601 which is not correct.

I found it here:

https://www.mercedespartsdelivered.c...r=A0054665701+

That's a MBZ dealer in Flordia that sell online parts at a discount. I've found they have decent prices, at least when shipped to me, in Alabama.

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post #10 of 33 (permalink) Old 06-05-2019, 12:32 PM Thread Starter
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Thank you Rodney! You are a very valuable source of information!!

I just ordered the pump, and although it's a bit pricey, I am going to change the power steering hose as well.

Thanks again!

Best,

Rick

2009 CLK 350 Coupe

2003 Lexus LS 430 Sold!!
(referred to as the Silver Mistake)

2005 E500 Estate - Sold

2004 E320 Estate - Sold

1998 E320 - Sold
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