S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Help!!! Power steering blew up!

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Old Jul 27, 2020 | 11:19 AM
  #1  
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W221 S500 2010
Help!!! Power steering blew up!

Hello friends:


I am spending a few days with my brother away from Madrid and, while driving in town, I was suddenly left without power steering. I managed to park and could see a pool of PS fluid like thre meters before the place where I detected the failure. A warning “AVERÍA ABC” (ABC malfunction) showed up. The engine bay was full of PS fluid, which I cleaned as best as I could.
f
Any ideas? Why a PS blowup triggered a ABC malfunction warning?

Any help will be welcomed.
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Old Jul 27, 2020 | 12:33 PM
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ABC systems have a cross wind compensation feature - thus the suspension and PAS are linked sharing the same fluid....

its probably a suspension unit or the pump than has popped a seal - various people overhaul as vastly reduced prices - or you're going to need a mortgage to get it fixed.

ABC system flush and filter change should be done at a minimum of 2 years or 25k mile if you want it to last
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Old Jul 27, 2020 | 12:35 PM
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Because one pump does both. The "tandem pump" provides hydraulic pressure for ABS and power steering. That's my understanding, at least in the W221. Not sure about the C215.
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Old Jul 27, 2020 | 01:30 PM
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W221 S500 2010
Originally Posted by DaleB
Because one pump does both. The "tandem pump" provides hydraulic pressure for ABS and power steering. That's my understanding, at least in the W221. Not sure about the C215.
Apparently it is not a random pump any more, but a single pump with two outlets that serve both circuits.
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Old Jul 27, 2020 | 01:50 PM
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Call it whatever you want. The parts catalog calls the pump a hydraulic pump, then calls everything around it mounting bolts, brackets, etc. "for tandem pump". That assumes you're talking about the 2003 CL 500 in your info, which is not a W221 so it would be in the wrong forum anyway. Just trying to help out. One pump, two systems. That's why losing power steering will cause ABC malfunctions, which was your original question unless I'm reading it wrong.
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Old Jul 27, 2020 | 02:02 PM
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W221 S500 2010
The car is a 2010 W221 S500. I just never updated my profile. Sorry.

Last edited by joseluu; Jul 27, 2020 at 02:05 PM.
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Old Jul 27, 2020 | 08:54 PM
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I have some bad news for you. You need someone who is knowledgeable about the ABC system to repair this. If you don't know whether the filter and fluid have been maintained properly, you should plan to service the entire ABC, fluid (Pentocin) and filter, valve block, with rodeo. This will make you ask yourself, "How much money do I have?".

But after you have spent all your cash on proper maintenance, this car will drive like a dream. Ask me how I know about all of this. Yup.
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Old Jul 28, 2020 | 04:38 PM
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I'd be willing to bet your main ABC pressure hose has blown. It is the one which goes from the pump to the front valve block. Easiest way to check is to fill the reservoir back up and start the car and look in the engine bay. You'll quickly see where it is leaking from - shut the car off quickly though. If the pump ran without fluid for long then you will have to also replace the pump. It is not too labour intensive but parts prices can be expensive. A number of people rebuild the pumps - eBay can guide you.
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Old Jul 28, 2020 | 04:53 PM
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Yup. My main hose gave out (the silly thing is 300 psi) and I replaced it. Sprayed Pentocin all over my engine and hood and under-chassis covers. What a mess. Didn't run the pump dry. Ran fine for two weeks. Then the valve block got contaminated because I didn't change the filter when I changed the hose. So I decided to do it all correctly and installed a new front valve block, new filter, totally new Pentocin, and a rodeo. Now it rides like a dream. I have learned my lesson. Every 20K miles or two years, new Pentocin fluid and a new filter.
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Old Jul 28, 2020 | 08:28 PM
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Originally Posted by vettebk
My main hose gave out (the silly thing is 300 psi)
Is this the main hose on your S600? Help!!! Power steering blew up!-photo170.jpg
Do you have to remove any other components to get the hose off?

Last edited by DrDoe; Jul 28, 2020 at 08:31 PM.
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Old Jul 29, 2020 | 05:25 AM
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W221 S500 2010
Thanks to all of you. I am getting a lot of useful information.

Yes, I know about Pentosin spraying all over the place. It hit the engine block an vaporized, creating a clout I inhaled a couple lungfuls that left me a little dizzy.

Íll try to fix it myself. I can count on good tools and good help (maybe I will be the “help” actually”).

I will keep you posted.
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Old Jul 29, 2020 | 12:32 PM
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W221 S500 2010
Hi,

When I collected the car this morning, there was a “T” junction in hte cooling system broken and iit was loosing refrigerant. I don’t believe in randomness, so I think there must be a relationship. Anyone can see causality here?
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Old Jul 29, 2020 | 03:06 PM
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W221 S500 2010
Originally Posted by DrDoe
Is this the main hose on your S600? Attachment 426068
Do you have to remove any other components to get the hose off?
Can anyone tell me the part number of this hose?
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Old Jul 29, 2020 | 03:36 PM
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That's Pump to Front Axle Valve Block
P/N: 2213203672 Rein Automotive
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Old Jul 30, 2020 | 02:59 AM
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W221 S500 2010
Thanks again.

It looks really awkward to replace.
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Old Aug 4, 2020 | 05:38 AM
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W221 S500 2010
It seems it “might” be the rupture of the coolant hose that led to the loss of power steering through generously spreading coolant all over the place which may have made the belt slip on the abc-***-power steering pump.

The culprit is the ”T” junction in the attached pictures, but I cannot find that piece on EPC. Can someone give the number for that piece?




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Old Aug 4, 2020 | 09:16 AM
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it looks like a straight bit of pipe.... I doubt a manufacturer would do that, the failure you got would be too common. Has someone "modified" your vehicle?

https://nemigaparts.com/cat_spares/e...221071/63w/50/

could it be 510 in this (designed as an all in one part?) or at the bottom 61 or 151

https://nemigaparts.com/cat_spares/e...71/63w/50/165/

Last edited by BOTUS; Aug 4, 2020 at 09:19 AM.
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Old Aug 4, 2020 | 12:12 PM
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W221 S500 2010
I bought it second hand, so it could have been modified before I got it.
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Old Aug 4, 2020 | 02:06 PM
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W221 S500 2010
The car has “auxiliary heating”. Maybe something to do with that “T”.
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Old Aug 4, 2020 | 05:05 PM
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On the left is a t bolt clamp, then you have lots of screw clamps which is off as MB usually use spring clamps for hoses. I think someone has been fiddling around here.
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Old Aug 5, 2020 | 04:15 AM
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W221 S500 2010
Originally Posted by pillowshot
On the left is a t bolt clamp, then you have lots of screw clamps which is off as MB usually use spring clamps for hoses. I think someone has been fiddling around here.
Now I have no doubt about that, but: what is the purpose?
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Old Aug 5, 2020 | 06:21 AM
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W221 S500 2010
Mistery solved!



The car runs on LPG and that T is where thy get hot water to warm the evaporator. The bulb lit on my head when I removed the piece and read TARTARINI on it.



They are sending a new METAL one.
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