W213 Fuse with letter S

Discussion in 'Electronics' started by micron, Sep 16, 2018 at 9:55 PM.

  1. micron

    micron New Member

    Messages:
    3
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    Jun 26, 2017
    Car:
    Mondeo
    Hi,

    Does anybody know why the fuse diagram for the w213 specifies the following?

    CAUTION: On fuses 400-484 use only fuses with add. of letter "S" according to MBN 10153-2

    Searching the internet I am not finding any fuses with S on them. What does it mean and in what way are they different to fuses without S ?
     
  2. allenhouse

    allenhouse Member

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    May 13, 2004
    Location:
    Surrey
    Car:
    S500L (W220) & SL500 (R230)
    The "S" is for "slow acting"...I think the MB fuses are silver plated to help prevent electrolysis. A slow blow fuse is different from a fast acting fuse in its capability to withstand transient pulse currents...it can withstand the surge current upon power-on/off, ensuring the equipment works normally.
     
  3. OP
    OP
    micron

    micron New Member

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    Jun 26, 2017
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    Mondeo
    Thank you! Now I find a lot about Slow acting fuses.
     
  4. brucemillar

    brucemillar MB Club Veteran

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    Surely if you use fuses with no letter “S” They would be “fue”?




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