B180 buzzing noise after shut down

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leenico21

New Member
Joined
Feb 15, 2016
Messages
1
Car
B Class B180
Hi Chaps

Can anyone help me?

I have a B CLASS B180, 2012, PETROL

When i shut he engine off I hear a loud buzzing noise from the engine bay it only lasts around 2 to 3 seconds

The noise is not there when engine is running its almost like its purging air once engine is shut down

Any help would be appreciated
 

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