merc c220 diesel engine - whirring noise - barney100

I noticed a slight whirring sound from under the bonnet a few hours after getting home. any ideas?

merc c220 diesel engine - whirring noise - SLO76
What age is it?
merc c220 diesel engine - whirring noise - barney100

2012

merc c220 diesel engine - whirring noise - SLO76
Most likely what you are hearing is the blower motor for the climate control. Under certain conditions the blower motor will be activated 1 hour or more after the vehicle is shut down and will operate for up to 30 minutes. This is to facilitate drying of the A/C evaporator in order to minimize the risk of moisture related odor. Nothing to worry about.

Edited by SLO76 on 14/04/2017 at 22:50

merc c220 diesel engine - whirring noise - barney100

Thanks for that SLO76,

merc c220 diesel engine - whirring noise - SLO76
Happy to help
merc c220 diesel engine - whirring noise - elekie&a/c doctor

Or the radiator fan running after a dpf regen cycle.

 

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