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Thread: Replacing rear SLS struts - should they be pre-filled with fluid?

  1. #1
    E500E Guru sheward's Avatar
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    Replacing rear SLS struts - should they be pre-filled with fluid?

    I replaced the rear struts in the car the other day. I bled the pressure off at one of the struts' banjo fitting. This was much easier and less messy than using the SLS valve.

    Is there any reason I should not fill the struts with fluid before reconnecting the fittings to aid/quicken the bleeding process?

    drew
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    Drew
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    E500E Guru nocfn's Avatar
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    Re: Replacing rear SLS struts - should they be pre-filled with fluid?

    I believe (and this is what I did every time c126/w124) install the new struts dry, turn on car with hood in service position. Have engine idle up to about 1500 rpm, add fluid accordingly. Raise and lower as the FSM suggests, add fluid when needed. If you have not done so, once level bleed is done, run old fluid out while adding new fluid so that you are clean with fluid.
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    Senior Member LWB250's Avatar
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    Re: Replacing rear SLS struts - should they be pre-filled with fluid?

    The system is self bleeding, so cracking lines at the struts or accumulators doesn't really accomplish that much I think. I prefer just to do as nocfn suggests and let the system bleed itself out. At least that's what I've done on numerous MBs with SLS that I've owned.

    I definitely change the fluid and filter (if equipped) on a regular basis. I go nuts whenever I see an engine compartment shot with an SLS reservoir that has black fluid it in. Arrrgh.

    Dan

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    Re: Replacing rear SLS struts - should they be pre-filled with fluid?

    Although there is no need to pre-fill the SLS hydroleg... I also don't think it would hurt anything? Klink, any input here?


  7. #5
    E500E Guru sheward's Avatar
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    Re: Replacing rear SLS struts - should they be pre-filled with fluid?

    I can't see how it would hurt either. Mostly concerned about trapping additional air pockets. Most likely needless concern.

    drew
    Drew
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    92 500e 180,000+ miles
    93 500e 179,000 miles sold
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