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Power steering pump

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Old Sep 9, 2019 | 05:28 PM
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rde1492
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2006 ML350
Power steering pump
I am installing a new power steering pump with new pulley.
Is there anything else I should purchase?
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Old Sep 9, 2019 | 08:20 PM
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'10 CL550, '12 GL550
O-ring that seals reservoir to pump.
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Old Sep 10, 2019 | 04:16 AM
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Maj. Dundee
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2002 ML 320 & 2006 ML500
What 350, gas or diesel? If it's diesel, supply full vin # as there are different part numbers.
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Old Sep 10, 2019 | 09:05 AM
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rde1492
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2006 ML350
Gas
It is a gas model. Thank You
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Old Sep 10, 2019 | 09:08 AM
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Maj. Dundee
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2002 ML 320 & 2006 ML500
Originally Posted by rde1492
It is a gas model. Thank You

One other question. Why are you replacing the pump?
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Old Sep 10, 2019 | 09:11 AM
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rde1492
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2006 ML350
Power steering pump
It leaks
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Old Sep 10, 2019 | 09:37 AM
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Maj. Dundee
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2002 ML 320 & 2006 ML500
Originally Posted by rde1492
It leaks

I figured as much. The leak is always caused by the seal at the reservoir. Buy the seal at a dealer and install.

Then follow instructions for proper bleeding.
Attached Files
File Type: pdf
PS Bleed.PDF (100.4 KB, 173 views)
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Old Sep 17, 2019 | 10:23 AM
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RudiVenter
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2004 ML500 (W163),2006 ML500 (W164)
Originally Posted by Maj. Dundee
I figured as much. The leak is always caused by the seal at the reservoir. Buy the seal at a dealer and install.

Then follow instructions for proper bleeding.
Interesting, I had a leak on my ML500 as well and the local repair shop insisted on replacing the pump, also insisted on replacing the steering rack as it also had a leak. That was before I found this forum, thanks for sharing your knowledge with us!
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Old Oct 2, 2019 | 10:54 AM
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2004 ML500 (W163),2006 ML500 (W164)
Since I wrote the post above I have received the vehicle back and it is going really well. I was really happy till I noticed there was STILL a power steering fluid leak, not fun since I am very far from home and no real support close! Thinking of Maj Dundee's post I did some investigation and yes, the leak is where the reservoir feeds the system!! Not much I can do now, I did manage to find some MB power steering fluid so I will simply have to top it up regularly till I get back to civilization.....

Seems like I spend a lot of money on a fix that was the wrong one. Sadly I only discovered this forum AFTER the ML500 was already in the process of being "fixed"....

Other than this little issue I am really having fun with the ML on some African back roads.
Rudi
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