Strange noise after turning engine off.

ferrispedro

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Good day all,this is my first post after buying a 2002 ML270.I am delighted with my first dabble in the MB field but slightly puzzled by a sound I get after switching the engine off.It sounds as if something is still quietly running in the engine compartment.Probably a simple explanation (I hope!) Peter.
 

djb

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welcome to the forum

yes there are various items that run on for a short while, then turn off, my clk does a sort of zizz, followed by a light thuck, so I imagine the ml is similar, so nothing to worry about. Others more knowledgeable will list all the items that stay awake on ignition off.

David
 

LSD

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Better than a strange noise after turning it on... :)
 

star

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or it could be the vacuum modulator valve just humming as the vacuum dissappears. Normally its the one by the battery on a ML.
 


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