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2005 Mercedes-Benz S600 Biturbo
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19 Posts
Discussion Starter #1
Tools Required - 2 Jack Stands, 50pc Socket Set, Flat Head and Philips Screw Driver

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Well that's a joke.. don't try this at home. You will need a place with a lift, full tool box and Mercedes SDS.

Here is my thread about what happened before I knew what happened: http://www.benzworld.org/forums/w220-s-class/1426147-abc-issue-all-fluid-drained-out.html

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The ABC tandem pump has a high-pressure side that uses a radial piston pump for the ABC side, which runs at 3000 psi. There is also a low-pressure side that side that is used for the power steering.

The ABC side has two lines coming out of the pump, one line goes to the pulsation damper which then distributes the fluid to the rest of the system and the other line ends in a "dead end" and I think it's designed to provide pressure relief. The lines go from metal to rubber to metal again, looks like my line let go at the connection from rubber to metal, causing fluid to leak out and everything else goes down hill from there.

The ripped line:





The space in the nose of the car is very tight, there are a lot of lines, hoses, wires, etc...





Since all of the fluid was drained from the system, the ABC pump ran dry and ingested air, causing damage to the pump it self. The pump needs to be replaced along with the broken line. Because the M275 engine is big, and the engine bay room is tight, most of the components on the front driver's side needed to be removed, starting with the airbox, ABC fluid tanks, A/C line, Radiator Fan, Coolant Lines, Transmission fluid lines, etc..



Once removed, access to the pump is still very limited:



In order to access the banjo bolt that connects the ABC high pressure lines to the pump, the driver's side engine mount needs to be disconnected from the subframe and the motor has to be raised on the driver's side with a jack:





Once the engine is raised, the high pressure lines are disconnected and the pump can be unbolted from the engine. This is the empty space for the pump once removed:



Here is the new pump after installation:

 

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2005 Mercedes-Benz S600 Biturbo
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19 Posts
Discussion Starter #2
Once the pump is in, the new lines are installed and the system needs to be filled and bled. This requires Pentosin CHF 11S mineral oil, which is not cheap at about $40/liter...



Here are some pictures of the old lines and the new ones. Notice the differences in design and the use of heat shrink to further deter the hoses from corrosion...

Old lines and pump:







Here are the new lines and the new pump:





 

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W215-CL500, W208-CLK320, W140-300SE
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630 Posts
Oxygen, thanks for sharing.

That was quick and good work by your ppl at TT!

How many hours total did it take for them to complete the job?
 

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Registered
2005 Mercedes-Benz S600 Biturbo
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19 Posts
Discussion Starter #5
Does anyone know what year they switched the production cars to use the upgraded hose?
I'm not sure about that... if you go to the dealership and open the hood on any 55, 600 or 65 car that has ABC, you can look down between the motor and the fan shroud, you should see the lines. If they look like my new ones, that year has them.
 

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2005 Mercedes-Benz S600 Biturbo
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19 Posts
Discussion Starter #6
Oxygen, thanks for sharing.

That was quick and good work by your ppl at TT!

How many hours total did it take for them to complete the job?
Well not so much my people at TT, I work there myself... :D

It took me about 16 hours from start to finish.
 

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cl500 w215
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32 Posts
how long can this pump work without oil? My mechanic changed the pump, but didn't bleed and flush the system, so air was in the hose, then he aded some more oil (2l). Is this bad for the pump?

and how to bleed air out, after pump change?

why there are no pictures?

can you renew this pump, or you have to buy new one ?
 

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Mercedes-Benz S500 2001
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1 Posts
Looking for the pics, seems like those are removed. If there is any way I can get the pics in the original post?
 

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W220 Moderator
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6,021 Posts
Hi,

These pics (like many) have been lost for a possible variety of reasons .............

If, (since 2009), the OP's have not sent us the pictures or pic links by now to edit into the post, then I very much doubt they will !!

There have been more recent threads about this with pictures, if you want pictures you will just have to do what we all do, and search search search the Forum ;)

HTH,
 
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