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1997 E-420, 2001 E-320, 2007 S-550, 2009 E-350
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361 Posts
Discussion Starter #1
Hello All. I have 1997 E-420 that has leaky power steering pump seal. So I have purchased new rebuild pump.

I am planning to install the rebuild power steering pump in my 1997 E-420.

As far as I understand that power steering pump is hold in place on power steering pump bracket.

My questions are following.

If I want to remove the power steering pump, how many bolts in front (It seem like 2 of 13 mm bolts under the pulley, you can reach them after removing the belt and pulley) and how many bolts are (It seems like 2 of E-12 ) in back? All these 2 bolts in front and 2 bolts in back hold power steering pump to power steering pump bracket.

So what If I want to just remove the whole power steering pump assembly along with power steering pump bracket. How many bolts for power steering pumps in front (Its seems like only one INHEX 6 mm) and how many bolts in back (it seems like 2 of E-12 bolts).

Please see below some photos. I am also adding video link, this video was taken from under the car looking at back of the power steering pump and power steering pump bracket.

Please can someone confirm my understating and give me some feedback. As always, thank you in advance to all of you for your support.





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Outstanding Contributor , SDS Guru
1998 MB E300TD, 1997 MB E36 AMG, 2001 MB E55 AMG
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4,343 Posts
I haven't played with a M119 pump, so I don't know. But the one on M113 had two bolts in front, two bolts on rear, one other bolt was to connect chassis ground wire, and one bolt to hold the power steering reservoir.
 

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Registered
1997 E-420, 2001 E-320, 2007 S-550, 2009 E-350
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361 Posts
Discussion Starter #3
Deplore, thank you. M119 in E-420 has slightly different bolting.

Is any one have WIS or 1997 E-420 for Power Steering Pump? Please help.
 

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W163 and General M Gremlin
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3,749 Posts
Deplore, thank you. M119 in E-420 has slightly different bolting.

Is any one have WIS or 1997 E-420 for Power Steering Pump? Please help.
hadam,

M119 was used in the w124, w140s. You may want to start / ask in the w124 forum.
Also, take a look here - this might assist you.

EDIT: could not read the manufacturer tag on yours - ZF or Vickers/LuK?
 

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Registered
1997 E-420, 2001 E-320, 2007 S-550, 2009 E-350
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361 Posts
Discussion Starter #5
Khomer2, thank you so much for all your help. This was very helpful. I will remove the power steering pump first. Here will be my steps.

Slightly Un-tight 3 of 13 mm bolts on power steering pump pulley while the belt is on.
Remove the belt.
Remove the pulley.
Remove front 2 of 13 mm bolts that holding pump to bracket.
Remove back 2 of E-12 bolts that holding pump to bracket.
Undo low pressure hose to pump.
Undo high pressure tubing to pump by using 17 mm wrench.

Once the power steering pump is removed, then I will see how much mess this leakage us caused, if there is to much mess then I will remove the power steering pump bracket also to clean up the area that has been exposed to leaking power steering pump fluid.

Do you know what is the best de-greaser to remove the leaky power steering fluid mess around mounting bracket? Can I use brake parts cleaner or I need to get some kind of grease remover?

The below photos from you link are same as mine in W210 E-420. Front bolts are same 13 mm, the rear bolts are not Hex, but E-12.

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W163 and General M Gremlin
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3,749 Posts
Glad you found them helpful and hopefully you can get any unanswered Qs from the other good BW members in the other model forums.
I've always used brake cleaner for all my grease cleaning.
(I buy these by the case - better pricing and DIYers use this stuff all the time.) :)

Appreciate your detailed photo diary here (helps immensely, ALL members reading)
Keep us posted on your progress.

btw, upon closer inspection of your PS tag, I now realize it's a ZF.
Not sure if you are aware, but they do make repair kits for these PS units - both ZF and LuK.
 

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Registered
1997 E-420, 2001 E-320, 2007 S-550, 2009 E-350
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361 Posts
Discussion Starter #7
Khomer2, thank you for your kind words. I will use brake cleaner to clean up the leaky power steering fluid mess.

I will add more photos once I am done with my DIY. I did not find to much info in forum on 1997 E-420 M119 power steering pump DIY, but W140 DIY for power steering pump is very closed.

Thank you for mentioning repair kit for power steering pump. I did some research and found my E-420 pump front seal leak can be fix by just replacing seal and O'rings in the kit. I have order the kit for next time.

I was able to get WIS from eBay for $8.95. I check the WIS and it matches what I have suspected. See below photo. I believe I am good to go and do my DIY on power steering pump.

I will keep you all posted. As always, thank you all for your support.


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W163 and General M Gremlin
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3,749 Posts
hadam,
We are all looking forward to hear and see about your progress, and repair kit fix in the near future. :)
 
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