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ABC pulsation damper and Filter DIY repair

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Old 01-01-2012, 07:38 PM   #1
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ABC pulsation damper and Filter DIY repair

The suspension pulsation damper will cause a humming / buzzing noise when not working correctly.

See TSB Topic number LI32.50-P-048280 for more detailed information.



Not every thing I do is according to the strict guidelines of WIS, so use my directions at your own risk.

Jack up front end. Find the 2 bleed screws on the LF and RF next to the torque strut bushing and bleed the system. Make sure you have the car secure because you will lose all suspension pressure after this is done.





Remove the pulsation damper. You will need a 24MM wrench for this, because of how the threads are welded to the unit you can't fit the wrench in every position. Maybe you can take this off with a oil filter remover?



This is a good time to change your filter for the suspension.



The top is held on by a hook, remove by pressing down on the spring.


My fluid was black so I pumped out what was in the res. try to be as clean as you can be.


Fill up res to the engine off min/max, install filter.

I started the car and set it to normal height, check fluid level at engine on min/max. Raise up then normal 15 times if any major components were replaced while checking fluid level only when set in the normal ride height level. If you hear a hissing noise in the area where you installed the pulsation damper or in the rear of your car then shut it off and bleed at the same bleed screws.

I had the hissing noise so I had to bleed the system 5 times. I had no luck getting rid of the noise. I ran the rodeo and dynamic test along with testing the pump and other components and had no codes after I was finished.

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Old 05-28-2015, 02:06 PM   #2
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Two questions.
1. I can't find a pulsation damper for less than $350, and various older threads mention paying ~$150. Is this a supply and demand issue, where everyone is getting these replaced since the TSB, or is something else funny going on in the global ABC pulsation damper market?

2. Where are the pictures?! Pleeeaassseeeeeee I want to DIY this, and having these pictures will probably be very useful!
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Old 05-28-2015, 05:27 PM   #3
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Carbizindio seems like the pictures are no longer available. Would be nice if they were still available.

Fried chicken did you check http://www.autohausaz.com or http://www.ecstuning.com seems to me they were in the $150 to $170 range. There are actually (4) accumulators on the Mercedes S-Class with ABC suspension. On my car 2003 S500 the part numbers are 220 327 01 15 (2), 220 327 02 15 (1) and 220 320 04 15 (1). I believe the last one is the pulsation damper. It list on ecstuning for $164. and on autohausaz for $190. When you do your part number searches I have found that you get better results when there are no spacees left between the numbers.
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Last edited by ibeforreal; 05-28-2015 at 05:35 PM.
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Old 05-29-2015, 09:57 AM   #4
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The ones that typically fail are the two large ones
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Old 05-29-2015, 12:30 PM   #5
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I agree with you Jnash. Those two are generally the culprits.
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Old 05-29-2015, 01:31 PM   #6
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Old 05-29-2015, 07:08 PM   #7
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Originally Posted by ibeforreal View Post
Carbizindio seems like the pictures are no longer available. Would be nice if they were still available.

Fried chicken did you check http://www.autohausaz.com or http://www.ecstuning.com seems to me they were in the $150 to $170 range. There are actually (4) accumulators on the Mercedes S-Class with ABC suspension. On my car 2003 S500 the part numbers are 220 327 01 15 (2), 220 327 02 15 (1) and 220 320 04 15 (1). I believe the last one is the pulsation damper. It list on ecstuning for $164. and on autohausaz for $190. When you do your part number searches I have found that you get better results when there are no spacees left between the numbers.
I'm not sure if any of those parts are the one's I'm looking for.

I'm looking for the pulsation damper mentioned in TSB LI32.50-P0048280

Here's a link to it although I'm not 100% sure it will work:
http://www.revbase.com/BBBMotor/TSb/...dPdf?id=180082

It's a part that bolts pretty much directly onto the tandem pump.
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Old 05-30-2015, 05:33 AM   #8
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Can anybody fix the missing pictures?
Is there a difference between an S500 V8 and S600 V12?
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Old 05-30-2015, 11:11 PM   #9
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Originally Posted by MCMLXIX View Post
Can anybody fix the missing pictures?
Is there a difference between an S500 V8 and S600 V12?
It is my understanding that yes, the S600 V12 requires a very expensive repair because the pulsation damper is integrated or otherwise. I am not sure exactly why.
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Old 05-31-2015, 02:44 AM   #10
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They are identical.
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K&Ns, 80mm TB, NPI headers, X-pipe / 3in pipes, Kleemann Cams & 168mm Pulley, ECU & TCU tune. 550cc injectors, Meziere WP136S SC pump. UPD SC pulley & SC belt wrap, Alum idler pulley set. Fuel rail loop, LFR7AIX plugs, NPI heat exchanger, -10C mod, shift paddles, TeleAid removed.
Lowering links (1.5" front, 1" rear), 18x9.5+35 offset rims, clear side markers, KG Key retrofit, H/W Valentine1, BT phone, BT AUX, laser jam, upgraded fans in seat backs, inline ABC mag filter.
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Old 05-31-2015, 10:32 AM   #11
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The S600, S55, CL, and S500 are identical.
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Old 05-31-2015, 02:13 PM   #12
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Just kidding, they are identical xD
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Old 05-31-2015, 02:13 PM
 
 
 
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abc, bleed, check, dampener, damper, dampner, diy, filter, li3250p048280, mbworld, mercedes, pulsation, repair, suspension, w220



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