merc300e
Senior Member
hello - I have a 2001 c180 2.0 - when cold there is a loud whirring noise which disappears as the engine heats up. Seems to come centrally from the engine front? Strangely it continues for a few seconds when the engine is switched off. Even stalling the engine to stop it fast when switched off the sound continues for a few seconds - slowing to a stop within 4 seconds it sounds very fast like a belt tensioner pulley would but why does it not stop with the engine? the electric fan is not running. Switching air con on/off makes no difference. - car has done 76000 with full indi SH
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