SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

SL/R129: Rear accumulators? Help diagnosing sound from rear SL600

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Old Feb 15, 2022 | 11:09 AM
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97 SL600, 03 CLK55, 03 S55, 04 SL55, 05 C55, 07 R500
Rear accumulators? Help diagnosing sound from rear SL600

Hey folks,

I have a 1997 SL600 that has a really stiff ride. I figured it was the accumulators, so I ordered two of part number: 1403280515





Is this the correct part number? In other places I found: 1293200115

I have not changed them yet, but today I noticed a new sound coming from the rear right side of the car. Anyone have any idea what this might be? A punctured hose perhaps?

Video:

Last edited by thesheikh; Feb 15, 2022 at 11:12 AM.
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Old Feb 15, 2022 | 11:43 AM
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Part number 1403280515 is good for the rear accumulators and 1293200115 is good for the front.

You will want to do both front accumulators at the same time and both rear together, but as step 2.

Get a few liters of the suspension fluid before beginning and a wide flat disposable aluminum cooking tray from Walmart for $2.

I don't know what that sound is, but anything that makes that much noise should be easy to locate while you roll under the car. Could be anything from the fuel pump, to one of the suspension fluid controllers. Please let us know when you identify the component.

Do a search on my site ID (mahunt) for a detailed R/R of the accumulators. There are a bunch of steps to follow, but the maintenance isn't really all that difficult. More messy and anything, which is what the flat tray is for.

The car's suspension will be wonderful after the upkeep.
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Old Feb 15, 2022 | 11:46 AM
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97 SL600, 03 CLK55, 03 S55, 04 SL55, 05 C55, 07 R500
Originally Posted by mahunt
Part number 1403280515 is good for the rear accumulators and 1293200115 is good for the front.

You will want to do both front accumulators at the same time and both rear together, but as step 2.

Get a few liters of the suspension fluid before beginning and a wide flat disposable aluminum cooking tray from Walmart for $2.

I don't know what that sound is, but anything that makes that much noise should be easy to locate while you roll under the car. Could be anything from the fuel pump, to one of the suspension fluid controllers. Please let us know when you identify the component.

Do a search on my site ID (mahunt) for a detailed R/R of the accumulators. There are a bunch of steps to follow, but the maintenance isn't really all that difficult. More messy and anything, which is what the flat tray is for.

The car's suspension will be wonderful after the upkeep.
I actually had your thread bookmarked and will be using it as a guide! Thanks so much for that.

The dealership I purchased the car from is letting me use their lift for a couple hours this Sunday evening to replace the rears. I do not think I will have the time to do the fronts. 😢. From what I gather, they are more difficult and require tools that I might not have access to while I am there.
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Old Feb 15, 2022 | 01:38 PM
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IMHO, the fronts are easier.

I thought the rears needed more disassembly that the fronts.

Just about everything in the trunk needs to come out and I used flare nut wrenches to ensure against rounding the VERY difficult to replace fittings.

Any insight into the noise from the rear?
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Old Feb 15, 2022 | 02:40 PM
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The green relais above the batterie should be the fuel pump. Pull it, put a wire in and listen.
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Old Feb 15, 2022 | 07:42 PM
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flush the suspension hydraulic fluid at the same time. You'll need 5 of this: https://www.fcpeuro.com/products/bmw...id-54340394395.

Once everything is done, frequently raise and lower the suspension to get rid of air in the system.
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Old Feb 15, 2022 | 07:48 PM
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Videos on replacing accumulators

I love this guy. I owe him a lot of thanks!

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